Page 1 Your LEHR Authorized Dealer and Service Provider Call Toll Free: 1-877-666-8679 LP5.0 S/L Service Manual P r o p a n e O u t b o a r d E n g i n e Technical Specifications and Step by Step Guides Phone : 310.839.9009...
Page 2 LEHR LP2.5 HP Rev.A 2013 Service Manual Table of Contents General Information and Specifications Fuel Systems Ignition Powerhead Gearcase Miscellaneous Parts Book Reference Operators Manual Reference...
Page 3 LEHR LP5.0 HP Rev.A 2014 General Information and Specifications Understanding Propane General Specifications Engine Profile Line Drawing Maintenance Specifications Maintenance Schedule Engine Fastener Torque Specifications General Torque Values Quick Notes Fuel Consumption Chart Special Tools Adjusting Engine Idle Speed Checking the Spark Plug Changing the Engine Oil Changing the Gearcase Oil...
Page 4 LEHR LP5.0 HP Rev.A 2014 UNDERSTANDING PROPANE SAFETY WARNINGS FOR PROPANE UNITS NOTE: FIRE/EXPLOSION HAZARD NOTE: Use propane only in containers and/or remote Contains enough gas to cause serious re, explosion, larger tanks speci cally designed and approved for this and burns.
Page 5: General Specifications
LEHR LP5.0 HP Rev.A 2014 General Specifications Item Model LP 5.0 S / L Dimension Overall length 717 mm (28.2 in) Overall width 361 mm (14.2 in) Overall height 1,029 mm (40.5 in) / 1156 mm (45.5 in) Boat transom height 381mm (15.0 in) / 1508 mm (20 in)
Page 6 LEHR LP5.0 HP Rev.A 2014 General Specifications Item Model LP 5.0 S / L Fuel and oil Propane Fuel type 110 Octane Fuel rating 4-stroke motor oil 10W-30 Engine oil type SE, SF, SG, SH, or SJ (API) Engine oil grade 0.5 L (0.53 US Quarts) (17 oz.)
Page 7 LEHR LP5.0 HP Rev.A 2014 LEHR INC. PROPANE POWERED OUTBOARD MARINE ENGINE MODELS: LP5.0S & LP5.0L 14.50 B (S) 22.50 B (L) 27.50 C (S) 17.50 C (L) 22.50 19.50 4.25 12.00 14.00 14.00 2.25 9.75 23.50 13.25 12.50 10.50...
Page 8 LEHR LP5.0 HP Rev.A 2014 Maintenance Specifications : Power Unit Model LP 5.0 S / L Item Power unit Minimum compression pressure* 660 kPa (6.6 kgf/cm², 94 psi) Cylinder head Warpage limit 0.1 mm (0.004 in) Cylinder Bore size 59.00 - 59.02 mm (2.323 - 2.324 in) Taper limit 0.08 mm (0.0031 in)
Page 9 LEHR LP5.0 HP Rev.A 2014 Item Model LP 5.0 S / L Oil ring Thickness 1.87 - 1.95 mm (0.0736-0.0768 in) Width 2.4 mm (0.0945 in) End gap 2.5 mm (0.0024 in) Side clearance 0.2 - 0.7 mm (0.0008-0.0024 in)
Page 10: Electrical Specifications
LEHR LP5.0 HP Rev.A 2014 Item Model LP 5.0 S / L Connecting rod Small end inside diameter 13.006-13.020 mm (0.5120-0.5126 in) Big end inside diameter 24.000-24.015 mm (0.9449-0.9455 in) Big end side clearance 0.2-0.6 (0.008-0.024 in) Crankpin oil clearance 0.016-0.046 mm (0.0006-0.0018 in)
Page 11: Maintenance Schedule
REPLACEMENT PARTS If replacement parts are necessary, use only genuine LEHR parts or parts of the same type and of equivalent strength and materials. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers.
Page 12: Engine Fastener Torque Specifications
LEHR LP5.0 HP Rev.A 2014 Engine Fastener Torque Specifications Thread Size Item Tightening Torques N•m kgf•m ft•lb Power Unit Step Connecting rod cap Step Step Crankcase bolt Step 10.3 Step Cylinder head bolt 22.1 Step Step Step Step Cylinder head cover bolt...
Page 13: General Torques
LEHR LP5.0 HP Rev.A 2014 General Torques This chart specifies tightening torques for standard fasteners with a standard ISO thread pitch. Tightening torque specifications for special components or assemblies are provided in applicable sections for this manual. To avoid warpage, tighten multi-fastener assemblies in a crisscross fashion and progressive stages until the specified torque is reached. Unless otherwise specified, torque specifications require clean, dry threads. Components should be at room temperature. Tightening Torques Bolt or Nut...
Page 14 LEHR LP5.0 HP Rev.A 2014 Quick Notes Commonly Referred to Specifications Carburetor Metering Needle Base Settings measured from the flat of the slide to the tip of the needle 14.5 mm (0.716 in) Test Tank Minimum RPM WOT Specifications with a standard propeller with a maximum of 24.1cm or (9 ½”) water level as mea-...
Page 15 How to read engine Serial Number Code: Example….LP5.0L 13C00031 LP5.0L 00031 Model Year Month Engine Number Lehr Propane 5.0 HP Long Shaft Year built 2013 Month built March (Month built uses alpha A thru L for Jan thru Dec) Last five digits are production number or #31...
Page 16 LEHR LP5.0 HP Rev.A 2014...
Page 17: Service Tools
LEHR LP5.0 HP Rev.A 2014 Service Tools I J K L M N A Digital Multimeter B Compression Pressure Gauge C Universal Puller D Spark Tester E Inductive Tachometer F Calipers G Paper Clip H Feeler Gauge (Assorted Metric Hand Tools I J K L M N)
Page 18 LEHR LP5.0 HP Rev.A 2014 Adjusting Engine Idle Speed 1. Place engine in a suitable water filled test tank. Water level should be approximately 9 ½” from the top of the transom. Hook up an inductive tachometer suitable for a single cylinder, four stroke engine. Start the engine and allow it to warm up to proper operat- ing temperature, about 3 minutes.
Page 19 LEHR LP5.0 HP Rev.A 2014 Checking the Spark Plug Remove the upper engine cover. Remove the rubber spark plug boot . Remove spark plug by using the spark plug wrench provided in the tool kit, the handle of this tool is shaped specifically to access the spark plug. Most universal tools will not work.
Page 20: Changing The Engine Oil
LEHR LP5.0 HP Rev.A 2014 Changing the Engine Oil 1. Remove the oil filler cap Place a drain pan under the drain hole, and then remove the drain bolt let the oil drain completely. Inspect the copper washer, replace if necessary. Install the drain bolt , (13 mm socket) and then tighten it to the specified torque.
Page 21 INSPECTING AND REPLACING ANODE 5. With the outboard motor in a vertical position and using a flexible or pres- LEHR outboard motors are protected from corrosion by a sacrificial anode. Inspect the external anode surized filling device, inject the gear oil into the gear oil drain screw hole. periodically. Remove scales from the surfaces of the anode. Do not paint the anode, as this would render it ineffective.
Page 22 LEHR LP5.0 HP Rev.A 2014 Lubrication Points 1. Apply water resistant anit-corrosion grease to the areas shown. Apply grease to the grease nipple until it flows from the bushings.
Page 23 LEHR LP5.0 HP Rev.A 2014 Valve Lash Check (Engine must be cold) Perform at 10 Hours and every 100 hours after that. Remove the stop lanyard from the emergency stop switch on the tiller arm. Remove the rear carrying handle screws , then flex the handle open to remove it.
Page 24 LEHR LP5.0 HP Rev.A 2014 Remove the spark plug. 6. Rotate the crankshaft to TDC (Top Dead Center) as the intake valve closes and stop. Both intake and exhaust valves should be completely closed. Intake 0.08 ~ 0.12 mm (0.003 ~ 0.005 in) Exhaust 0.08 ~ 0.12mm (0.003 ~ 0.005 in) Valves are adjusted cold. Adjust both the intake and exhaust valves to specification and lock the adjuster with the lock nut.
Page 25 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 26 LEHR LP2.5 HP Rev.A 2013 Propane Fuel Sytem Removing and Replacing the Carburetor Installing the Slide Throttle Cable Cap Adjusting the Idle Speed Removing the Fuel Line Assembly Installing the Fuel Line Assembly Notes...
Page 27 LEHR LP5.0 HP Rev.A 2014 Removing and replacing the carburetor 1. Disconnect the propane tank if it is still connected from either inlet source. 2. With a 16mm wrench, remove the fuel line to carburetor banjo bolt two rubber washers . Loosen the bolt gradually and let any propane trapped in system escape slowly. Keep fingers away from escaping gas as it can cause frostbite burns.
Page 28 LEHR LP5.0 HP Rev.A 2014 A. Orient the slide with the brass retainer pin pointing down, then compress the spring with the slide and jiggle it until the pin drops out, releasing the throttle cable core wire. B. The throttle spring, slide, and needle assembly are now free from the throttle cable and cap.
Page 29 LEHR LP5.0 HP Rev.A 2014 Installing the Slide and Throttle Cable Cap 1. Place carburetor cap and then the throttle slide spring onto the cable followed by the slide assembly. Use the slide to compress the spring against the cap and watch for the throttle cable end coming into view in the retainer pin hole in the slide.
Page 30 LEHR LP5.0 HP Rev.A 2014 Adjusting Engine Idle Speed 1. Place engine in a suitable water filled test tank. Water level should be approximately 9 ½” from the top of the transom. Hook up an inductive tachometer suitable for a single cylinder, four stroke engine. Start the engine and allow it to warm up to proper oper- ating temperature, about 3 minutes.
Page 31 LEHR LP5.0 HP Rev.A 2014 Removing the Fuel Line 1. Remove the top cover. Remove the rubber seal along the top edge of the bottom covers. 2. Remove 4 bolts that retains the rear carrying handle and flex the handle open to remove it. 3. Remove two bolts from the front carrying handle on the side closest to the shift handle.
Page 32 LEHR LP5.0 HP Rev.A 2014 Removing the Fuel Line (continued) 5. Remove the banjo bolt from the carburetor with a 16mm wrench. 6. Remove the brass propane bottle connector from the rubber hose with a 10mm and 14mm open end wrench.
Page 33 LEHR LP5.0 HP Rev.A 2014 Installing the Fuel Line Assembly 1. Position the 3 stainless mounting clips on to the fuel line in the same orientation they were on the old line. 2. Reassemble the remote tank connector and fuel line to the front lower engine cover.
Page 34 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 35 LEHR LP5.0 HP Rev.A 2014 Ignition System Ignition System / Components and Schematic Checking Ignition Spark Testing Engine Stop Switch Checking Ignition Coil Adjusting or Replacing the Ignition Coil Notes...
Page 36: Ignition System
LEHR LP5.0 HP Rev.A 2014 Ignition System In this ignition system, high voltage is induced in the secondary coil when electric current is produced in the primary coil by the spinning magnet on the rotating flywheel. A small electronic circuit board inside the coil controls spark advance.
Page 37 LEHR LP5.0 HP Rev.A 2014 Checking the Ignition Spark 1. Remove the upper engine cover. Remove the spark plug. Use the provided spark plug wrench, as access to the plug is limited. Check the condition of the plug. Replace it if rusty or fouled.
Page 38 LEHR LP5.0 HP Rev.A 2014 Checking the Engine Stop Switch ctr i cal sys te ms 1. Check the engine stop switch for continuity Checking the engine shut-off switch 2. Disconnect the white wire from the ignition coil pigtail at the bullet connector. plug cap from the Check the engine shut-off switch for con...
Page 39 LEHR LP5.0 HP Rev.A 2014 Testing the Ignition Coil 1. If ignition coil is still on the engine, remove the spark plug cap from the spark plug by turning the cap counterclockwise while pulling on the spark plug CAP. Never pull on the spark plug wire.
Page 40 LEHR LP5.0 HP Rev.A 2014 Adjusting or Replacing Ignition Coil 1. Remove the spark plug hi tension lead. There are three bolts on the brack- et assembly. Remove bolts and nuts from position , and loosen bolt . Rotate the bottle bracket to expose the starter assembly bolt.
Page 41 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 42 LEHR LP5.0 HP Rev.A 2014 Powerhead Checking the Cooling System Cooling System Flow Chart Inspect/Replace Thermostat or Sacrificial Anode Replacing the Head Gasket Valve Lash Adjustment Removing and Installing a Powerhead Notes...
Page 43: Checking The Cooling System
LEHR LP5.0 HP Rev.A 2014 Checking the Cooling System Inspect the cooling water inlet holes for obstructions or debris. Clean if necessary. To test for proper operation, place the lower unit in water with a suitable water supply. The water level should be approximately 9½ to 11½ inch- es below the top of the boat transom or test tank transom.
Page 44 LEHR LP5.0 HP Rev.A 2014 Cooling System Flowchart Crankcase Cylinder Block Cylinder Head Cooling Water Upper Midsection Propane Thermostat Pilot Hole (Top Starboard Side) Evaporator Lower Midsection Atmosphere Water Pump Idle Exhaust Port Exhaust Port Cooling Water Inlet Atmosphere Above the Prop...
Page 45 LEHR LP5.0 HP Rev.A 2014 To Inspect or Replace the Thermostat or Sacrificial Anode Remove the thermostat housing bolts , cooling hose ,thermostat housing , and thermostat Inspect the anode for deterioration and replace if necessary (25% or less remaining). Anode deterioration is normal and expected.
Page 46 LEHR LP5.0 HP Rev.A 2014 To Replace the Head Gasket 1. Remove the rear carrying handle, the rear lower engine cover, and the propane bottle bracket. (Page 22, steps 1-3) 2. Remove the spark plug. 3. Remove the carburetor, (Page 26, steps 1-3 and 5). Remove the intake manifold.
Page 47 LEHR LP5.0 HP Rev.A 2014 To Replace the Head Gasket (cont.) 10. Rotate the crankshaft to TDC (Top Dead Center) as the intake valve closes and stops. Both intake and exhaust valves should be completely closed. Valves are adjusted cold. Adjust both the intake and exhaust valves to specification and lock the adjuster with the lock nut. Valve clearance 0.08-0.12 mm (0.003-0.005 in) Intake 0.08-0.12 mm (0.003-0.005 in)
Page 48 LEHR LP5.0 HP Rev.A 2014 Valve Lash Check (Engine must be cold) Perform at 10 Hours and every 100 hours after that. Remove the stop lanyard from the emergency stop switch on the tiller arm. Remove the rear carrying handle, screws , then flex the handle open to remove it.
Page 49 LEHR LP5.0 HP Rev.A 2014 Remove the spark plug. 6. Rotate the crankshaft to TDC (Top Dead Center) as the intake valve closes and stop. Both intake and exhaust valves should be completely closed. Intake 0.08 ~ 0.12 mm (0.003 ~ 0.005 in) Exhaust 0.08 ~ 0.12mm (0.003 ~ 0.005 in) Valves are adjusted cold. Adjust both the intake and exhaust valves to specification and lock the adjuster with the lock nut.
Page 50 LEHR LP5.0 HP Rev.A 2014 Removing and Installing the Power Head 1. Remove the emergency stop lanyard from the emergency stop switch on the tiller arm. 2. Remove the rear carrying handle and the rear lower cover (Section 6-2). 3. Remove the throttle cable and slide assembly.
Page 51 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 52 LEHR LP5.0 HP Rev.A 2014 Gearcase Checking Gearcase for Oil and Water Leaks Removing the Gearcase from the Mid Section Gearcase Line Drawing Reference Picture Water Pump Disassembly Installation of Water Pump Installing the Gearcase Notes...
Page 53 LEHR LP5.0 HP Rev.A 2014 Check the Gearcase for Leaks 1. Remove the oil level screw , and then install a pressure tester. 2. Apply 16 PSI pressure to the gearcase. The pressure should remain steady for a minimum of 10 seconds.
Page 54 LEHR LP5.0 HP Rev.A 2014 Removing the gearcase to inspect/service water pump 1. Remove the spark plug wire from the spark plug, and place the engine in neutral. 2. Remove the shift rod connector plug on the exhaust housing and loosen the shift rod connector bolt A.
Page 55 LEHR LP5.0 HP Rev.A 2014 Gearcase Exploded View LP5.0 LOWER UNIT DRIVE PARTS LP5.0 LOWER UNIT DRIVE PARTS LP5.0 LOWER UNIT DRIVE COMPONENTS DWG NO DESCRIPTION DWG NO DWG NO DESCRIPTION DESCRIPTION Q'TY Q'TY LEHR PART NO LEHR PART NO MSRP MSRP ×...
Page 56 LEHR LP5.0 HP Rev.A 2014 Water Pump Disassembly 1. Place the gearcase in a suitable holding fixture and remove the 4 bolts that attach the water pump housing assembly to the gearcase. 2. Slide the pump housing up the shaft, noting the condition and assembly order of the water pump parts.
Page 57 LEHR LP5.0 HP Rev.A 2014 Installing the Water Pump Impeller 1. Install the stainless steel plate onto the dowels on the gearcase. Apply film of grease to the impeller blades and impeller cup. 2. Install the impeller drivepin into the drive shaft. 3. Align the groove on the impeller with the drive pin, and then install the impeller onto the drive shaft.
Page 58 LEHR LP5.0 HP Rev.A 2014 Installing the gearcase 1. Grease the driveshaft splines and place the shift rod into neutral gear (push shift rod down and up to find middle position). 2. Install the gearcase back onto the midsection, carefully aligning the copper water tube...
Page 59 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 60 LEHR LP5.0 HP Rev.A 2014 Miscellaneous Service Removing the Bottle Bracket Removing the Engine Rear Lower Cover Rubber Bushing Installation Throttle Cable Installation Tiller Handle Reference Picture Steering Friction Screw Installation Manual Starter Adjusting Start in Gear Protection Notes...
Page 61 LEHR LP5.0 HP Rev.A 2014 Removing the Bottle Bracket 1. Disconnect and remove the propane bottle if attached. 2. The bottle bracket has three bolts and nuts retaining it to support brackets. Loosen the bolts and remove them one at a time along with the washers. Note there is a spacer bushing located underneath the bolt...
Page 62 LEHR LP5.0 HP Rev.A 2014 Removing the Rear Engine Cover 1. Remove the top cover. Remove the rubber seal along the top edge of the bottom covers. 2. Remove 4 bolts that retains the rear carrying handle and flex the handle open to remove it. 3. Remove two bolts from the front carrying handle closest to the shift handle.
Page 63: Throttle Cable Installation
• 1 . Install: LEHR LP5.0 HP Rev.A 2014 Ru bber bushin STEERING HANDLE • SERVICE POINTS Rubber Bushing Installation Rubber bushing installation • 1 . Install: Align the projection 1. Install the rubber bushing. Ru bber bushing side of the rubber b •...
Page 64 LEHR LP5.0 HP Rev.A 2014 LP5.0 STEERING PARTS Tiller Handle Reference LP5.0 STEERING PARTS DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP × l l i t l l i t l l i t l i h p i l...
Page 65 UP PE R CA SE AS S'V LEHR LP5.0 HP Rev.A 2014 SERVICE POINTS Bushing inspection • Steering Friction Screw Installation I nspect: Bushing 1. Grease the threads of the friction screw Damage/crack � Re 2. Insert the screw into the hole in the pivot tube casting...
Page 66 LEHR LP5.0 HP Rev.A 2014 Replacing the Manual Starter Assembly 1. Remove the spark plug hi tension lead. There are three bolts on the brack- et assembly. Remove bolts and nuts from position , and loosen bolt . Rotate the bottle bracket to expose the starter assembly bolt.
Page 67 LEHR LP5.0 HP Rev.A 2014 Adjusting Start in Gear Protection 1. Put the gear selector lever in neutral position. 2. Adjust lock nuts on cable so that the pointer on the lever aligns with the arrow on the starter 3. Test the operation to be sure the start rope is locked when latched firmly in forward or reverse gear, but pulls freely with no noise in neutral.
Page 68 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 69 LEHR LP5.0 HP Rev.A 2014 DETAILED PARTS LIST AND DIAGRAMS MODELS: LP5.0S LP5.0L...
Page 70 LEHR LP5.0 HP Rev.A 2014 LP5.0 LOWER UNIT PARTS...
Page 71 LEHR LP5.0 HP Rev.A 2014 LP5.0 LOWER UNIT PARTS DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP l l a t f i t f i t f i t f i l i h p i l × t t i t f i ×...
Page 72 LEHR LP5.0 HP Rev.A 2014 LP5.0 LOWER UNIT DRIVE COMPONENTS...
Page 73 LEHR LP5.0 HP Rev.A 2014 LP5.0 LOWER UNIT DRIVE PARTS DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP × o l l n i l × l l e l l e n i l l t s l l e...
Page 74 LEHR LP5.0 HP Rev.A 2014 LP5.0 STEERING PARTS...
Page 75 LEHR LP5.0 HP Rev.A 2014 LP5.0 STEERING PARTS DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP × l l i t l l i t l l i t l i h p i l l i h p i l ×...
Page 76 LEHR LP5.0 HP Rev.A 2014 LP5.0 CLAMP PARTS...
Page 77 LEHR LP5.0 HP Rev.A 2014 LP5.0 CLAMP PARTS DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP ) t f s t l t l i t t i l t l i t t c i t c i t c i...
Page 78 LEHR LP5.0 HP Rev.A 2014 LP5.0 POWER SYSTEM 29 30 21 22 23...
Page 79 LEHR LP5.0 HP Rev.A 2014 LP5.0 POWER SYSTEM DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP oilgear assembly s t l aluminium washer l l a oil seal body l i h p i l l i o l l i f...
Page 80 LEHR LP5.0 HP Rev.A 2014 flywheel assembly e l l y l f flywheel nut i o j spacer band clamp assembly fuel line assembly o l l banjo sealing washer Banjo Bolt banjo bolt evaporator...
Page 81 LEHR LP5.0 HP Rev.A 2014 LP5.0 VALVE SYSTEM LP5.0 VALVE SYSTEM DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP t f i l...
Page 82 LEHR LP5.0 HP Rev.A 2014 LP5.0 CRANKSHAFT ASSEMBLY LP5.0 CRANKSHAFT ASSEMBLY DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP hexagon flange bolts connecting rod assembly woodruff key piston pin piston pin retainer piston ring set...
Page 83 LEHR LP5.0 HP Rev.A 2014 LP5.0 COVERS LP5.0 COVERS 5 4 3 5 4 3 19 18 19 18 LP5.0 COVERS DESCRIPTION Q'TY LEHR PART NO MSRP DWG NO c t i × n i l n i l l i o...
Page 84 LP5.0 STARTING SYSTEM LEHR LP5.0 HP Rev.A 2014 LP5.0 STARTING SYSTEM LP5.0 STARTING SYSTEM DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP p i l d i l p i l...
Page 85 LEHR LP5.0 HP Rev.A 2014 LP5.0 ACCESSORIES LP5.0 ACCESSORIES DWG NO DESCRIPTION Q'TY LEHR PART NO MSRP s ' r c t i t i k 4 ft propane connector hose...
Page 86 LEHR LP5.0 HP Rev.A 2014 OPERATOR’S MANUAL PROPANE POWERED OUTBOARD MARINE ENGINE 5 HP MODEL: LP 5.0S LP 5.0L CAUTION: BEFORE OPERATING THIS PRODUCT, READ AND FOLLOW ALL SAFETY RULES AND OPERATING INSTRUCTIONS. FOR SERVICE TABLE OF CONTENTS Call 1-866-941-LEHR (5347) Important Manual Information............1...
Page 87 UNDERSTANDING PROPANE LEHR LP5.0 HP Rev.A 2014 UNDERSTANDING PROPANE SAFETY WARNINGS FOR PROPANE UNITS NOTE: FIRE/EXPLOSION HAZARD NOTE: Use propane only in containers and/or remote Contains enough gas to cause serious re, explosion, SAFETY WARNINGS FOR PROPANE UNITS NOTE: FIRE/EXPLOSION HAZARD larger tanks speci cally designed and approved for this and burns.
Page 88 LEHR outboard motor. Understanding and following these instructions will help you get the most trouble free use from your LEHR outboard. If you have any questions about operation or maintenance of your outboard motor please contact LEHR at 1-866-941-LEHR (5347).
Page 89: General Information
LEHR LP5.0 HP Rev.A 2014 GENERAL INFORMATION • Before mounting or operating the outboard motor, completely read manual and labels. Reading them will give you a good understanding of the motor and its operation. • Before operating the boat, read any owner's or operator's manuals supplied with it and all labels. Be sure you understand all items from the boat manual as well as this engine manual before operating.
Page 90 The outboard motor serial number is stamped on the label attached to the clamp bracket. Record your outboard motor serial number, you will need it when ordering spare parts from your LEHR dealer or for reference if your outboard motor is stolen.
Page 91 LEHR LP5.0 HP Rev.A 2014 GENERAL INFORMATION FUEL TANK Use a standard 16.4 oz. (1 lb.) propane canister connected to the rear propane tank position or any larger DOT approved propane tank connected to the remote propane connector with an approved high pressure propane hose.
Page 92 LEHR LP5.0 HP Rev.A 2014 GENERAL INFORMATION WARNING: Do not overtighten the throttle friction adjuster. If there is too much resistance, it could be difficult to move throttle lever or grip, which could result in an accident. When constant speed is desired, tighten the adjuster just enough to maintain the desired throttle setting.
Page 93 LEHR LP5.0 HP Rev.A 2014 GENERAL INFORMATION TRIM ROD The position of the trim rod determines the angle of the outboard motor in relation to the transom. TILT LOCK MECHANISM The tilt support lock keeps the outboard motor in the tilted up position. If the outboard engine needs to be tilted up out of the water or to get the propeller higher than the bottom of the boat, push down on the tiller handle while lifting up in the rear carrying handle.
Page 94 LEHR LP5.0 HP Rev.A 2014 INSTALLATION INSTALLATION Incorrect engine height or obstructions to smooth water flow in front of the propeller can cause propeller cavitation while the boat is cruising. Cavitation occurs when the engine speeds up momentarily and suddenly slows as the propeller engages the water.
Page 95 LEHR LP5.0 HP Rev.A 2014 OPERATION PRE-OPERATION CHECKS WARNING: If anything in the pre-operation check is not working properly, have it inspected and repaired before operating the outboard motor. Failure to do so could result in an accident. CONTROLS • Check throttle, shift, and steering for proper operation before starting the engine.
Page 96 LEHR LP5.0 HP Rev.A 2014 OPERATION INSTALLING THE PROPANE CANISTER 1. Make sure the engine is off. 2. If the propane canister to be installed has a protective plastic cap over the threaded end, remove it. Make sure the canister clamp is in the unlatched position. If the rubber tank plug is in place, remove it.
Page 97 LEHR LP5.0 HP Rev.A 2014 OPERATION STARTING ENGINE 1. Place the gear shift lever in neutral. The engine is equipped with a lockout which will prevent the stater rope from being pulled if the engine is engaged in forward or reverse.
Page 98 LEHR LP5.0 HP Rev.A 2014 OPERATION SHIFTING WARNING: Before shifting, make sure no swimmers are in the water near your boat. 1. Place the throttle in the slowest position. 2. Move the gear shift lever quickly to the desired gear from neutral to forward or reverse.
Page 99 LEHR LP5.0 HP Rev.A 2014 OPERATION BOW DOWN Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and making it hard to increase speed. Operating with excessive trim-in at higher speeds also makes the boat unstable.
Page 100 LEHR LP5.0 HP Rev.A 2014 MAINTENANCE TRANSPORTING AND STORING THE OUTBOARD MOTOR WARNING: Leaking fuel is a fire hazard. When transporting or storing the outboard motor, disconnect the propane connector to prevent the possibility of fuel from leaking. Use care when transporting the fuel tank whether in boat or car.
Page 101 LEHR LP5.0 HP Rev.A 2014 MAINTENANCE STORING THE OUTBOARD MOTOR NOTE: Place a towel or something similar under the outboard motor to protect it from damage. When storing your outboard motor for prolonged periods of time (2 months or longer), several important procedures must be performed to prevent excessive damage.
Page 102 REPLACEMENT PARTS If replacement parts are necessary, use only genuine LEHR parts or parts of the same type and of equivalent strength and materials. Any part of inferior quality may malfunction, and the resulting loss of control could endanger the operator and passengers.
Page 103 Oily or dark color ceramic could indicate a malfunction. Do not attempt to diagnose any problems yourself. Instead, take the outboard motor to a LEHR dealer. You should periodically remove and inspect the spark plug because the electric arcing will cause the spark plug to slowly erode and the gap will increase.
Page 104 If you have difficulty verifying the idle speed , or the idle speed requires adjustment, consult a LEHR dealer or other qualified mechanic. 2. Verify whether the idle speed is set to specification (2000 150 RPM).
Page 105 LEHR LP5.0 HP Rev.A 2014 MAINTENANCE 5. Make sure that there are no oil leaks. Continued operation with an oil leak could cause severe engine damage. 6. Turn off the engine and wait 3 minutes. Recheck the oil level using the oil dipstick to be sure the level falls between the upper and lower marks when the dipstick is screwed in all the way.
Page 106 PROPELLER SELECTION Your LEHR outboard engine is supplied with a propeller that matches the needs of a boat most suited to an engine of its size. If you feel you are not getting optimal performance from the engine on your boat, a different pitch propeller could help.
Page 107 7. Insert and tighten the gear oil drain screw. INSPECTING AND REPLACING ANODE LEHR outboard motors are protected from corrosion by a sacrificial anode. Inspect the external anode periodically. Remove scales from the surfaces of the anode. Do not paint the anode, as this would render it ineffective.
Page 108: Troubleshooting
A: Inspect spark plug. Clean or replace with recommended type. Q: Is the Idle speed set correctly? A: Adjust Idle screw or have serviced by LEHR dealer. Q: Are fuel joints connected correctly? A: Check for any leaks or smell of propane. Tighten any loose fittings. Replace any faulty fuel lines or connectors.
Page 109 Q: Is ignition wire damaged or poorly connected? A: Check wires for wears and breaks. Q: Have electrical wires failed? A: Have serviced by a LEHR dealer. ENGINE VIBRATES EXCESSIVELY Q: Is propeller damaged? A: Have propeller repaired or replaced.
Page 110 6. Give a strong pull out to crank and start the engine. Repeat if necessary. PROCEDURE FOR SUBMERGED MOTOR If the outboard motor has been submerged, immediately take it to a LEHR dealer. Some corrosion may begin almost immediately. If you cannot immediately take the outboard to a dealer, follow the procedures below in order to minimize engine damage.
Page 111: Specifications
LEHR LP5.0 HP Rev.A 2014 SPECIFICATIONS NOTE: MODELS LP 5.0S & LP 5.0L (S) SHORT SHAFT (L) LONG SHAFT ENGINE TYPE WATER COOLED 4-CYCLE DISPLACEMENT 112.0 CC BORE X STROKE 59 mm X 41 mm POWER 5 hp (3.5 kW) MAX OPERATING R.
Page 112 • As the marine engine owner, you should however be aware that LEHR may deny you warranty coverage if your marine engine or a part has failed due to abuse, neglect, or improper maintenance or unapproved modifications.
Page 113 (d) Emission Warranty Parts List. The following components are included in the emission related warranty of the engine: Carburetor, Fuel Lines & Fittings, Ignition Coil, Spark Plug, Valves, and Cam. LEHR will furnish with each new engine written instructions for the maintenance and use of the engine by the owner.
Page 114 LEHR LP5.0 HP Rev.A 2014 NOTES...
Page 115 LEHR LP5.0 HP Rev.A 2014 One Star – Low Emission The one-star label identi es Personal Watercraft, Outboard, Sterndrive and Inboard engines that meet the Air Resources Board’s Personal Watercraft and Outboard marine engine 2001 exhaust emission standards. Engines meeting these standards have 75% lower emissions than conventional carbureted two-stroke engines.

LEHR LP5.0 S Service Manual

Quick Links

Need help?

Questions and answers

Related Manuals for LEHR LP5.0 S

Summary of Contents for LEHR LP5.0 S

Table of Contents