272144 Vanguard Twin Cylinder OHV BRIGGS & STRATTON.pdf

23. Cylinder – check cylinder bores and bearings.
Remove oil seal.
24. Disassemble and check connecting rods,
pistons, piston pins and rings.
25. Disassemble and inspect oil pump.
Inspection and Repairs
1. Clean parts.
2. Resize cylinder bore as required.
3. Replace main bearing.
4. Replace all oil seals.
5. Replace valve guides.
6. Reface and lap valves and seats.
7. Replace armatures.
8. Repair carburetor.
9. Replace rewind starter spring and rope (if
equipped)
Reassemble
1. Crankshaft.
2. Pistons, piston pins, rings and connecting rods.
3. Tappets, cam gear.
4. Mechanical governor.
5. Oil pump.
6. Crankcase cover – check end play. Replace oil
seal.
7. Electric starter.
8. Flywheel and starter pulley (if equipped).
9. Armatures – adjust air gap.
10. Check spark.
11. Valves, seals, springs and retainers.
12. Cylinder heads, push rods, rocker arms and
cylinder shields.
13. Adjust valve clearance.
14. Valve covers, breather and valley cover.
15. Linkage and governor controls.
16. Carburetor and intake manifold.
17. Check and adjust mechanical governor.
18. Blower housing.
19. Fuel pump and bracket (if equipped).
Fuel tank and bracket (if equipped).
20. Clean and assemble air cleaner.
21. Exhaust manifold, mufflers.
22. Install new spark plugs.
23. Replace oil filter. Fill crankcase with oil. Fill with
gas. Start engine.
24. Adjust carburetor.
25. Adjust governor controls to obtain correct
engine speed (remote controls).
26. Re-torque cylinder head screws.
27. Spray paint engine and apply decals.
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