Last year my 25d ran at top rpms of 2700 under load. This year 2200, but even at 2200 the boat speed is about 5.1-5.2 OTG based on my GPS (knotmeter has long since given up the ghost).
Question: how do I determine if the tack is accurate. btw without a load the tack tops out at about 3100rpm. The engine (1 GM) is professionally maintained annually.
Checking the tackometer
Moderator: Jim Walsh
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Dick Kobayashi
- Posts: 596
- Joined: Apr 2nd, '05, 16:31
- Location: Former owner of 3 CDs, most recently Susan B, a 25D
Checking the tackometer
Dick K
CD 25D Susan B #104
Mattapoisett, MA
Fleet Captain - Northeast Fleet 2014/2015
Tempus Fugit. And not only that, it goes by fast. (Ron Vacarro 1945 - 1971)
CD 25D Susan B #104
Mattapoisett, MA
Fleet Captain - Northeast Fleet 2014/2015
Tempus Fugit. And not only that, it goes by fast. (Ron Vacarro 1945 - 1971)
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Steve Laume
- Posts: 4127
- Joined: Feb 13th, '05, 20:40
- Location: Raven1984 Cape Dory 30C Hull #309Noank, CT
- Contact:
Re: Checking the tackometer
If the Tach is reading the same as it usually does at high RPMs in neutral and at idle, I would suspect it is reading correctly at all times. It sounds like you may have a badly fouled prop, Steve.