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Forum: Propellers & Drive Systems

22-05-2009, 18:38

Replies: 17

Prop Size and Pitch?

Views: 6,684

Posted By amarinesurveyor

The 4-107 and 4-108 are essentially the same...

The 4-107 and 4-108 are essentially the same engine, 40 hp @ 3000 rpm, no need to suggest repalcing it with the 4-108. I believe the 107 & 108 refer to the total cubic inches, 107 versus 108, not...

Forum: Propellers & Drive Systems

22-05-2009, 06:03

Replies: 17

Prop Size and Pitch?

Views: 6,684

Posted By amarinesurveyor

The Westerbeke 4-107 should rev out at 3000 rpm...

The Westerbeke 4-107 should rev out at 3000 rpm while in gear. If you are only getting 2100 rpm now, you would have to take about 4 or 5 inches of pitch out of the prop; the rule of thumb is 200 rpm...

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