Abnormal Engine Noise; Glazed Drive Belt; Uneven Drive Belt Wear; Engine Idle Speed Too High - Arctic Cat Cougar Service Manual

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Drive Belt Not Operating
Smoothly in Primary Sheave
CHAPTER TWO
Glazed Drive Belt
a. Rough, grooved, pitted or scored drive
sheave face.
a. Excessive slippage caused by stuck or fro-
zen track.
b. Engine idle speed too high.
b. Defective drive belt.
Uneven Drive Belt Wear
Drive Belt Too Tight at Idle
a. Misaligned primary and secondary
sheaves.
a. Engine idle speed too high.
b. Incorrect sheave distance.
b. Loose engine mounts. c. Incorrect belt length.
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ABNORMAL ENGINE NOISE
I
Pinging 1 - - - - - - - - 1 Check:
L--------------------J •
Ignition timing too advanced
l
Abnormal noise during engine
idle with a cold engine
• Incorrect spark plug heat range
• Excessive carbon buildup in
combustion chamber
• Incorrect fuel/oil mixture ratio
• Poor quality fuel
1 - - - - - - - - 1 Check:
J •
Excessive piston clearance
• Excessive piston ring wear
• Excessive piston skirt wear
• Bent or damaged connecting rod
I
Abnormal noise during cruising
1
1 - - - - - - - - 1 Check:
L--------------------J •
Stuck piston ring
I
Abnormal noise during
sudden acceleration
• Damaged piston ring
• Worn main engine bearing
• Piston scuffing or light seizure
t - - - - - - - 1 Check:
I •
Excessive piston pin clearance
• Excessive clearance at the connecting
rod upper end
• Excessive clearance at the connecting
rod lower end