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Just put a Acme 475 prop on my boat and got back to 44 mph.
Also found out after taking the prop I had on my boat back to the shop that worked on the prop that they never worked on that prop....

Pulled tach out didn't fix speed problem.
Carb run great up to 38 then dogs
Anyone help?

Have a 1999 Moomba outback LS with a tachometer that is bouncing. I get up to 38 miles an hour and the tachometer starts to bounce around 4200-4300 RPMs. The Bouncing as a range from 4200 to 4700...

Boat is all better.
The first mechanic if you call him that put in the wrong jet and set the choke three clicks too far open.
Second mechanic corrected the jet problem and it works great.
Had to...

Speedo is checked with GPS