MERCARB 2 BARREL CARBURETOR
SERVICE MANUAL NUMBER 26
c. Fuel and Air Passages: Passages must be perfectly clean for proper carburetor
operation.
d. Accelerator Pump Plunger and Return Spring: Inspect pump plunger cup, pump
plunger spring (on pump assembly) and return spring.
e. Power Piston Spring: Check power piston spring for weakness or distortion.
f.
Idle Mixture Needle: Inspect idle mixture needle. If damaged, needle must be
replaced.
g. Levers and Linkages: Check levers, links and rods for wear.
h. Throttle Valve and Shaft: Check throttle shaft for excessive looseness in throttle
body. Check throttle valve and shaft for binding through entire operating range,
making sure valve opens and closes completely. Throttle body assembly must be
replaced if throttle valve and shaft are worn or damaged.
i.
Choke Valve and Shaft and Lever Assembly: Check shaft and lever assembly for
excessive looseness in air horn assembly. Check choke valve and shaft and lever
assembly for binding through entire operating range, making sure valve opens and
closes completely. Air horn assembly must be replaced if choke valve and shaft and
lever assembly are worn or damaged.
j.
Inspect Casting for visible damage. Inspect gasket surfaces. Inspect accelerator
pump plunger well for scoring or deposits.
Reassembly
IMPORTANT: DO NOT force idle mixture needle against seat as damage to needle
and/or seat will result.
FLOAT BOWL ASSEMBLY
IMPORTANT: Place float bowl and throttle assemblies in holding fixture to prevent
throttle valves from being damaged.
1.
Install check ball, spring, and retainer in passage as shown. Push retainer firmly into
slots.
c
b
a
72408
a - Check Ball
b - Spring
c - Retainer
Page 5B-26
90-861329--1 MARCH 1999
INDEX
| 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