Mercury 305 CID - Carburetor Adjustment Specifications; Carburetor Specifications; Engine Specifications

5F-2 - BOS / SAV EMISSIONS 90-823225--1 1096
Carburetor Specifications
Units of Measurements
In. (mm)
Engine Model
Carb
Type
Mercury Number
(Manufacturer Number)
Primary
Jet
Size
Second-
ary
Jet
Size
Metering
Rod
Number
Meter-
ing
Rod
Spring
Color
MCM
1994 Models and Earlier
Weber
3310-806545 (9663) .089 .092 16-656357 Natural
MIE and MCM
1995 Models and Earlier
WFB
3310-808012 (9668) .089 .086 16-666459 Green
Carburetor Adjustment Specifications
Make And Model Weber WFB
Float Level 1-9/32 (33)
Float Drop 2 In. (51)
Pump Rod Hole Location
Number 3 from end
(Hole closest to lever pivot point)
Accelerator Pump 7/16 (11) (Note 1)
Choke Pull Off 1/8 (3.5)
Choke Coil Rod Top of Rod Even with Bottom of Lever Hole (Note 2)
Note: 1. Measured from top of Carburetor to bottom of “S”-Link
Note: 2. Remove choke rod from lever hole, choke held closed and choke rod is pushed down with top edge of
rod even with bottom edge of hole.
Engine Specifications
Thermostat 160°F (71°C)
Ignition Timing 10° BTDC
Idle Speed in Neutral 775 RPM
Propane Idle Speed
(See Procedure)
850 RPM