1999 Volvo Penta "WT" Models Workshop Manual, Page 39Get this manual

1999 Volvo Penta "WT" Models Workshop Manual, Page 39

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Engine Runs Rough If At Slow SpeedCheck:
Engine Noises and Vibrations
Valves Hydraulic Lifters

Rapping only when starting (oil too heavy for prevailing weather, varnish on lif