The other day while taking my boat on its maiden voyage, I noticed that when the engine sync gauge was right in the middle (synced) the rpm's were off on the two motors.
If I matched the rpm's the sync gauge was off.
As this is my first boat with dual motors I'm curious to which is preferred.
And how would I correct the difference if that is in fact possible?
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Engine sync gauge vs. rpm's
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Dark Horse
Topic author
- Scurvy Dog
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2001 Carver 350 Mariner
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Engine sync gauge vs. rpm's
" The trouble with trouble is it usually starts out as fun!"
2001 350 Mariner w/ 350 Mercruisers
Home Port - Hudson, FL
2001 350 Mariner w/ 350 Mercruisers
Home Port - Hudson, FL
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Midnightsun
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2007 41CMY
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Re: Engine sync gauge vs. rpm's
One is obviously incorrect. Unsynced engine will not have a smooth sound, more like a hum or moaning going on. Which sounded right? Sync gauge or tachs synced?
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Dark Horse
Topic author
- Scurvy Dog
- Posts: 49
- Joined: April 29th, 2020, 11:33 am
- Vessel Info: "Dragonfly"
2001 Carver 350 Mariner
Twin 350 MAG MPI - Location: Hudson, FL
- Has thanked: 1 time
- Been thanked: 6 times
Re: Engine sync gauge vs. rpm's
Tachs synched by far. You could hear and feel the difference and that was how I ran it.
That Being said can I correct the sync to match the tach?
That Being said can I correct the sync to match the tach?
" The trouble with trouble is it usually starts out as fun!"
2001 350 Mariner w/ 350 Mercruisers
Home Port - Hudson, FL
2001 350 Mariner w/ 350 Mercruisers
Home Port - Hudson, FL
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mjk1040
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Re: Engine sync gauge vs. rpm's
A mechanic told me years ago to go by the sync not the tachs. if your rudders are true straight, experiment in a open body of smooth water. If the boat veers of one way or the other your problem 
should be resolved as to which is true.
should be resolved as to which is true.Mike 
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
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