TROUBLESHOOTING
SERVICE MANUAL NUMBER 26
Engine Runs Poorly At High RPM (continued)
Cause
Special Information
Coil
Distributor
Excessive play in shaft
Engine overheating
Low compression
Restricted exhaust
Refer to “Engine Overheats”
Worn valves, rings, cylinders, etc.
Poor Fuel Economy
Cause
Special Information
Fuel leaks
Prolonged idling; slow acceleration; failure
to cut back on throttle once boat is on
plane; boat overloaded; uneven weight
distribution
Operator habits
Bent, damaged or wrong propeller. Water
test boat for proper operating rpm at wide
open throttle
Engine laboring
Clogged flame arrestor
Engine compartment sealed too tight
Boat bottom
Not enough air for engine to run properly
Dirty (marine growth), hook, rocker
Idle mixture settings, accelerator pump
adjustments, linkage binding, choke
adjustment, carburetor flooding over, main
fuel jets
Carburetor
Improper fuel
Crankcase ventilation system not working
Engine needs tune-up
Engine running too cold or too hot
Plugged or restricted exhaust
Engine
Low compression
Index
Page 1C-20
90-861329--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 181 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(6 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM 4 Cylinder 181 cid 3.0L Marine Engines Service Manual Number 26 5.0 out of 5.0 based on 6 product reviews. Thanks for sharing this material. Helps a lot after suffering with bad mechanics. spend too much money and nothing very good
great manual, makes impossible jobs possible. without a manual you can not do the job, a must have.
Great resource. Excellent information provided.
Need help to install automate choke
Need help to instal automate choke