TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Engine Runs Poorly At High RPM
Cause
Special Information
Also refer to “Poor Boat Performance”
Crankcase overfilled with oil
Check oil level with boat at rest in the
water.
Anti-siphon valve (if equipped)
Plugged fuel tank vent
Fuel supply
Restricting fuel supply
Refer to “Fuel Injection Troubleshooting,”
SECTION 5D
Ignition timing
Low grade of fuel or water in the fuel
Spark plugs
Fouled, burned, cracked porcelain,
incorrect heat range
Spark plug wires
Distributor cap or rotor
Coil
Poor insulation, broken wires
Dirty or cracked
Distributor
Excessive play in shaft
Engine overheating
Low compression
Restricted exhaust
Refer to “Engine Overheats”
Worn valves, rings, cylinders, etc.
Engine Acceleration Is Poor
Cause
Special Instructions
Also refer to “Poor Boat Performance”
Idle mixture screws
Incorrect ignition timing
Incorrect distributor or amplifier advance
curve
Refer to SECTION 4B
Intake manifold
Cracked or dirty distributor cap or rotor
Vacuum leak
Fouled, burned; wrong heat range;
cracked porcelain
Spark plugs
Low compression
Page 1C-14
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...