1999 Volvo Penta "WT" Models Workshop Manual, Page 40Get this manual

1999 Volvo Penta "WT" Models Workshop Manual, Page 40

Engine Noises and Vibrations, Cont Ignition System (Ping or Knock)
Improper tuning Incorrect spark plug wire routing Use higher octane fuel See ElectricalIgnitionFuel Service Manual

Cooling System
Supply pump Loose belts, pu lIeys See Cooling System section

'M!ii.iij,hJ
Loose, broken or worn engine mounts Loose lag screws holding mounts to stringer

Crankshaft Balancer or Flywheel
Loose bolt(s)

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