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Forum: Troubleshooting

10-19-2021, 09:01 AM

Replies: 55

Over propped?

Views: 6,916

Posted By ndutton

If it were my boat (it's not), I'd pressure test...

If it were my boat (it's not), I'd pressure test the water jacket component of the exhaust just to be certain. It's a simple test with no downside.

Forum: Troubleshooting

10-19-2021, 07:46 AM

Replies: 55

Over propped?

Views: 6,916

Posted By ndutton

What you're calling a standpipe now is more...

What you're calling a standpipe now is more accurately an abbreviated water jacketed exhaust and you may have a bigger problem than the rusty pipe going into it. Why so rusty? That area of the...

Forum: Troubleshooting

10-07-2021, 07:44 PM

Replies: 55

Over propped?

Views: 6,916

Posted By ndutton

With boats and engines our size the number of...

With boats and engines our size the number of blades, 2 or 3, isn't dramatically significant in engine loading. You may find noodling with the prop size calculator found here...

Forum: Troubleshooting

10-07-2021, 07:06 PM

Replies: 55

Over propped?

Views: 6,916

Posted By ndutton

Says who and to what degree? The 12x7 might be a...

Says who and to what degree? The 12x7 might be a little aggressive but it's not terrible, certainly not so big as to be the sole cause of your performance problem. I'd guess there were well more...

Forum: Troubleshooting

10-04-2021, 07:51 PM

Replies: 55

Over propped?

Views: 6,916

Posted By ndutton

To eliminate them as possibilities I'd check the...

To eliminate them as possibilities I'd check the timing and centrifugal advance operation. No way a 12x7 is seriously overpropped. You should get 2000 RPM in forward all day long with a 12x7.

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