Yamaha MX250 User Manual

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TROUBLESHOOTING
ENGINE STARTS BUT STALLS
ENGINE STARTS BUT STALLS
No. Checking steps Possible remedy
1 Check the fuel level. Add the fuel if it is insufficient.
2 Check if the fuel tank cap (canister) is clogged. Clean or replace.
3 Check if the fuel cock is clogged. Clean.
4 Check if the fuel hoses is clogged. Clean.
5
Check if there is air suction from the carburetor joint, gas-
ket, or throttle shaft.
• Tighten the carburetor nuts securely.
• Replace the carburetor joint or gasket
with a new one.
6
Check the compression pressure.
(Refer to “MEASURING THE COMPRESSION PRES-
SURE” on page 3-1)
Too high:
Decarbonize the combustion chamber if
there is carbon deposits.
Too low:
Next checking steps.
7
Check the valve clearance.
(Refer to “ADJUSTING THE VALVE CLEARANCE” on
page 2-11)
Adjust the valve clearance.
8
Check if there is seizure, wear, or damage on the piston,
piston ring, or cylinder.
(Refer to “PISTON, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT” on page 3-32)
Rebore or replace.
9 Check the TCI unit air gap. Adjust.

Yamaha MX250 Specifications

General

Brand	Yamaha
Model	MX250
Category	Outboard Motor
Language	English