Table of Contents
Advertisement
Q. Is cooling system clogged?
A. Inspect cooling water inlet for obstruc-
tions.
Q. Is low oil pressure-alert indicator on or
blinking?
A. Have serviced by a Yamaha dealer.
Q. Is heat range of spark plugs incorrect?
A. Inspect spark plugs and replace with rec-
ommended type.
Q. Is specified engine oil not being used?
A. Inspect engine oil and replace with speci-
fied type.
Q. Is engine oil contaminated or deteriorat-
ed?
A. Replace engine oil with specified type.
Q. Is oil filter clogged?
A. Have serviced by a Yamaha dealer.
Q. Is oil pump malfunctioning?
A. Have serviced by a Yamaha dealer.
Q. Is thermostat or water pump malfunction-
ing?
A. Have serviced by a Yamaha dealer.
Q. Is there excess water in fuel filter?
A. Drain fuel filter.
Engine power loss.
Q. Is propeller damaged?
A. Have propeller repaired or replaced.
Q. Is propeller pitch or diameter incorrect?
Trouble Recovery
A. Install correct propeller to operate out-
board motor at its recommended speed
(r/min) range.
Q. Is outboard motor mounted at incorrect
height on transom?
A. Have outboard motor adjusted to proper
transom height.
Q. Has alert system activated?
A. Find and correct cause of alert.
Q. Is boat bottom fouled with marine growth?
A. Clean boat bottom.
Q. Are spark plugs fouled or of incorrect
type?
A. Inspect spark plugs. Clean or replace with
recommended type.
Q. Are weeds or other foreign material tan-
gled on gear housing?
A. Remove foreign material and clean lower
unit.
Q. Is fuel system clogged?
A. Inspect for pinched or kinked fuel line or
other obstructions in fuel system.
Q. Is fuel filter clogged?
A. Clean or replace fuel filter.
Q. Is fuel contaminated or stale?
A. Fill tank with clean, fresh fuel.
Q. Is spark plug gap incorrect?
A. Replace spark plug.
Q. Is ignition wiring damaged or poorly con-
nected?
89
Advertisement
Table of Contents
