SERVICE MANUAL NUMBER 26
TROUBLESHOOTING
Engine Acceleration Is Poor
Cause
Also refer to “Poor Boat Performance”
Idle mixture screws
Special Information
Incorrect ignition timing
Incorrect distributor or amplifier advance
curve
Refer to SECTION 4B
Check for stream of raw fuel from
accelerator pump discharge nozzle, when
opening throttle with engine shut off
Accelerator pump
Cracked or dirty distributor cap or rotor
Vacuum leak
Intake manifold or carburetor base
Fouled, burned; wrong heat range;
cracked porcelain
Spark plugs
Float adjustment
Dirty carburetor
Low compression
Engine Runs Poorly At High RPM
Cause
Special Information
Also refer to “Poor Boat Performance”
Check oil level with boat at rest in the
water.
Crankcase overfilled with oil
Anti-siphon valve (if equipped)
Plugged fuel tank vent
Restricting fuel supply
Refer to “Carburetor Malfunctions”
(See “Table of Contents”)
Fuel supply
Ignition timing
Low grade of fuel or water in the fuel
Fouled, burned, cracked porcelain,
incorrect heat range
Spark plugs
Spark plug wires
Poor insulation, broken wires
Dirty or cracked
Distributor cap or rotor
Index
90-861329--1
MARCH 1999
Page 1C-19
| 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