Yamaha T8 Rigging Manual page 24

Outboard Rigging Guide - 2001
Propeller Selection
It is very important to select the proper propeller
for the application of the engine. Perform the fol-
lowing steps to ensure the proper propeller selec-
tion:
1. Determine from the customer the intended
use of the boat (e.g., fishing, cruising, towing,
auxiliary motor, or high performance.)
2. Ask the customer the usual number of riders
and the amount of gear usually stored on
board.
3. Select a propeller that will provide peak per-
formance for the customer's engine and
application.
NOTE: Yamaha recommends to prop the engine
to the high end of the RPM range for the cus-
tomer's normal load. In some cases, if a customer
cruises and skis from the same boat, it may be
necessary for them to carry different propellers
for each application. This ensures peak perfor-
mance from the engine and adds longevity to the
engine. Each change in the pitch will produce an
approximately 300~400rpm variance.
This would be a good time to check the lower
unit lube level.
Pre-Operation Checks:
WARNING
If any item in the pre-operation check is not
working properly, have it inspected and
repaired before operating the outboard motor.
Otherwise, an accident could occur.
Fuel/Oil
1. Make sure there is plenty of fuel/oil for the
scheduled trip.
2. Make sure there are no fuel or oil leaks nor
gas fumes.
3. Be sure the fuel/oil hoses are not being flat-
tened or kinked by objects in the boat and no
sharp objects are near the fuel/oil hoses.
Controls
1. Check throttle, shift, and steering for proper
operation before starting the engine.
2. The controls should work smoothly - without
binding or unusual free play.
3. Look for loose or damaged connections.
4. Check the operation of the starter and stop
switches when the outboard motor is in the
water.
Engine
1. Check the engine and engine mounting.
2. Look for loose or damaged fasteners.
3. Check the propeller for damage.
4. Check that the battery is in good condition
and battery connections are secure.
CAUTION:
Do not start the engine out of the water.
Overheating and serious engine damage could
occur.
5. Ensure all rigging wires from the dash to the
engine are wire tied neatly and safely. When
customers see detail taken to route and hang
the wires neatly to the engine, they feel they
have received a quality rig.
NOTE: Be sure not to crush or pinch the fuel
line, oil line, speedo line, or water pressure
lines when tying up the wires.
CAUTION:
Before engine operation, install a fuel vacuum
gauge with a clear hose just before the pulse
fuel pumps. Fuel starvation can cause engine
failure.
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General Rigging Information