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Mercury 30 Service Manual

Mercury 30
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4-0 - POWERHEAD 90-826148R2 MARCH 1997
Table of Contents
Page
Specifications 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes: 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block Components 4-4. . . . . . . . . . . . . . . . .
Induction Manifold 4-6. . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft/Piston/Flywheel 4-8. . . . . . . . . . . . . . . . .
Torque Sequence 4-10. . . . . . . . . . . . . . . . . . . . . . . . . .
Powerhead Removal 4-10. . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Disassembly 4-12. . . . . . . . . . . . . . . . . . . .
Crankshaft Inspection 4-13. . .. . . . . . . . . . . . . . . .
Piston and Connecting Rod Disassembly 4-14. . . . .
Connecting Rods 4-15. . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning and Inspection 4-16. . . . . . . . . . . . . . . . . . . .
Cylinder Block and Crankcase Cover 4-16. . . . . .
Cylinder Bores 4-17. . . . . . . . . . . . . . . . . . . . . . . . .
Honing Procedure 4-17. . . . . . . . . . . . . . . . . . .
Pistons and Piston Rings 4-18. . . . . . . . . . . . . . . .
Cleaning Piston Ring Grooves 4-18. . . . . . . . .
Measuring Piston Roundness 4-18. . . . . . . . . .
Check Valve 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reed Blocks 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . .
Powerhead Reassembly and Installation 4-21. . . . . .
General Information 4-21. . . . . . . . . . . . . . . . . . . . .
End Cap 4-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembling Rod to Piston 4-22. . . . . . . . . . . . . . . .
Piston Ring Installation 4-23. . .. . . . . . . . . . . . . . .
Crankshaft Installation 4-25. . . . . . . . . . . . . . . . . . .
Installing Rods to Crankshaft 4-26. . . .. . . . . . . . .
Connecting Rod Cap Alignment 4-27.. . . . . . . . . .
Crankcase Cover to Block 4-27. . . . . . . . . . . . . . .
Intake/Reed Block Manifold Installation 4-29. . . .
Thermostat Cover Installation 4-30. . . . . . . . . . . .
30/40 Bleed Hose Routing 4-31. . . . . . . . . . . . . . . . . .
Powerhead Installation 4-32. . .. . . . . . . . . . . . . . . . . .
Test Run Procedure 4-33. . . . . . . . . . . . . . . . . . . . . . . .
Break-in Procedure 4-33.. . . . . . . . . . . . . . . . . . . . . . .

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Mercury 30 Specifications

General IconGeneral
BrandMercury
Model30
CategoryOutboard Motor
LanguageEnglish

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