Mercury 15XD User Manual

3
A
CARBURETOR/FUEL PUMP
90-826883R2 JUNE 1998 Page 3A-1
FUEL SYSTEM
Section 3A - Carburetor/Fuel Pump
Table of Contents
Specifications 3A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 3A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Carburetor (20/25/JET 20) 3A-2. . . . . . . . . . . . . . . . . . . . .
Carburetor (Seapro/Marathon 15/25 & Super 15) 3A-4.
Carburetor Adjustments 3A-6. . . . . . . . . . . . . . . . . . . . . . .
Low Speed Mixture Screw 3A-6. . . . . . . . . . . . . . . . . .
Main Jet 3A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Altitude Jet Chart 3A-7. . . . . . . . . . . . . . . . . . . . .
Carburetor Float Adjustment 3A-8. . . . . . . . . . . . . . . .
Carburetor Adjustments 3A-9. . . . . . . . . . . . . . . . . . . .
Fuel System Troubleshooting 3A-15. . . . . . . . . . . . . . . . .
General Information 3A-15. . . . . . . . . . . . . . . . . . . . . .
Carburetor Removal 3A-18. . . . . . . . . . . . . . . . . . . . . . . . .
Carburetor Installation 3A-19. . . . . . . . . . . . . . . . . . . . . . .
Fuel Pump 3A-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Disassembly 3A-22. . . . . . . . . . . . . . . .
Cleaning and Inspection 3A-22. . . . . . . . . . . . . . . . . . .
Reassembly and Installation 3A-22. . . . . . . . . . . . . . .
Primer System 3A-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symptoms of a defective primer system 3A-23. . . . .
Servicing Sight Bowl Fuel Filter 3A-24. . . . . . . . . . . . . . .
Specifications
CARBURETOR
SPECIFI-
CATIONS
Idle RPM (In Forward Gear)
Wide Open Throttle (WOT) RPM
20
25
Idle Mixture Screw
Adjustment (Preset-Turns Out)
20
20 Jet
25/25 Seapro/25 Marathon
Float Level
Main Jet Size
1994
1
/
2
thru 1996
-20 (WMC-44)
-25/20 Jet (WMC-45)
-25 Seapro/Marathon (WMC-46)
-25 Seapro/Marathon (WMC-46A)
1997 and Newer
-20 Jet (WMC-45)
-20 (WMC-52)
-25 (WMC-53)
-25 Seapro/Marathon (WMC-54)
750 ± 50
4500 - 5500
5000 - 6000
1 ± 1/4 Turn
1-1/2 ± 1/2 Turn
1-1/4 ± 1/4 Turn
1.0 in. (25.4 mm)
0.044 in. (1.12 mm)
0.076 in. (1.93 mm)
0.076 in. (1.93 mm)
0.080 in. (2.03 mm)
0.076 in. (1.93 mm)
0.044 in. (1.12 mm)
0.076 in. (1.93 mm)
0.080 in. (2.03 mm)
Special Tools
1. Carburetor Scale

Mercury 15XD Specifications

General

Brand	Mercury
Model	15XD
Category	Outboard Motor
Language	English