Multiquip operation manual MT-62HS -TROUBLESHOOTING Guide, Engine Troubleshooting

MT-62HS —TROUBLESHOOTING GUIDE

TABLE 4. ENGINE TROUBLESHOOTING

SYMPTOM	POSSIBLE PROBLEM	SOLUTION
Difficult to start
	Ignition plug being bridge?	Check ignition system.
Fuel is available but spark plug	Carbon deposit at ignition?	Clean or replace ignition.
will not ignite. (Power available at	Short circuit due to defective	Replace insulators.
high tension cable).
	insulators?
	Improper spark gap?	Set spark plug gap to the correct gap.
Fuel is available but spark plug	Short circuit at stop switch?	Check stop switch circuit. Replace stop switch if defective.
will not ignite. (Power NOT
available at high tension cable).	Ignition coil defective?	Replace ignition coil.
	Muffler clogged with carbon	Clean or replace muffler.
	deposits?
Fuel is available and spark plug	Mixed fuel quality is inadequate?	Check fuel to oil mixture.
ignites (compression normal).	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
	dust)?
	Air Cleaner clogged?	Clean or replace air cleaner.
	Defective cylinder head gasket?	Tighten cylinder head bolts or replace head gasket.
Fuel is available and spark plug
	Cylinder worn?	Replace cylinder.
ignites (compression low ).
	Spark plug loose?	Tighen spark plug.
Operation not satisfactory
	Air cleaner clogged?	Clean or replace air cleaner.
Not enough power available	Air in fuel line?	Bleed (remove air) from fuel line.
(compression normal, no miss-	Fuel level in carbureator float
firing).		Adjust carbureator float
	chamber improper?
	Carbon deposits in cylinder?	Clean or replace cylinder
	Ignition coil defective?	Flush fuel sytem and replace with fresh fuel.
Not enough power available
	Ignition plug often shorts?	Replace ignition wires, clean ignition.
(compression normal, miss-
firing).	Fuel in use inadequate (water,	Flush fuel sytem and replace with fresh fuel.
	dust)?
	Mixed fuel quality is inadequate?	Check fuel to oil mixture.
	Excessive carbon depostion in	Clean or replace crankcase.
Engine overheats.	combustion chamber?
	Exhaust or muffler clogged with	Clean or replace muffler.
	carbon.
	Spark plug heat value incorrect?	Replace spark plug with correct type spark plug.

PAGE 22 — MT-62HS — PARTS & OPERATION MANUAL — REV. #2 (12/15/03)