MERCARB 2 BARREL CARBURETOR
SERVICE MANUAL NUMBER 24
Final Idle Speed and Mixture
The ignition module must be locked into the timing mode to adjust idle speed and mixture.
Refer to SECTION 4B - “Timing - Thunderbolt V Models.”
EMISSIONS CARBURETOR
Sealed Carburetor Mixture Screw
The carburetor on this engine has a seal on the carburetor mixture screw. This seal prevents
adjustment of the fuel mixture setting.
CAUTION
Do not remove mixture screw seal and/or attempt to adjust fuel mixture setting.
Tampering with the mixture setting on this engine could affect the exhaust
emissions level, thus voiding the emissions certification. This seal should only be
removed by an authorized dealer or emissions testing agency.
Replacing Carburetor
NOTICE
Refer to “Precautions” in this section, BEFORE proceeding.
IMPORTANT: First follow the steps in “8 Point Carburetor Check List” to decide if the
problem is with the carburetor.
1.
2.
3.
4.
5.
6.
7.
Remove the battery cables.
Remove the carburetor.
Clean gasket surfaces.
Use a new gasket and install new carburetor.
Hold the carburetor filter nut with a wrench and tighten fuel line fitting securely.
Reconnect or install choke wires, vent hoses and flame arrestor.
Adjust carburetor and throttle cable.
Page 5B-16
90-861327--1 OCTOBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
Class 1