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Forum: General Boating Discussion

10-08-2012, 02:38 PM

Replies: 8

Severe Porpoising Problem

Views: 1,442

Posted By DavidO

Any particular pictures and to be honest it a...

Any particular pictures and to be honest it a fairly straightforward setup e.g. engine bolted to transom, the cavitation plate roughly 8 mm below the hull (when checked with a sprit level) and...

Forum: General Boating Discussion

10-08-2012, 12:11 PM

Replies: 8

Severe Porpoising Problem

Views: 1,442

Posted By DavidO

Max rpm is 6000 and as you say if this occurs I...

Max rpm is 6000 and as you say if this occurs I may need to go up a size in prop to bring the revs down!

Forum: General Boating Discussion

10-08-2012, 11:34 AM

Replies: 8

Severe Porpoising Problem

Views: 1,442

Posted By DavidO

Yes I am in the top hole and have some scope to...

Yes I am in the top hole and have some scope to come up and will give this a try!

Thanks

Forum: General Boating Discussion

10-08-2012, 11:17 AM

Replies: 8

Severe Porpoising Problem

Views: 1,442

Posted By DavidO

The cavitation plate is about 8 mm below the hull...

The cavitation plate is about 8 mm below the hull and I beleive the prop is a 13.5 x 15P

Forum: General Boating Discussion

10-08-2012, 10:25 AM

Replies: 8

Severe Porpoising Problem

Views: 1,442

Posted By DavidO

Severe Porpoising Problem

I am encountering porpoising on my 16 ½ foot speed boat. It is a closed bow boat and is running with a 90 Hp 4 stroke Mercury. Before purchasing it I was concerned that it was stern heavy with the 4...

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