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 RPMs. My boat used to do 42 43 mph in no longer does that I feel because of the bouncing tachometer is causing the rev limiter to engage. When tachometer starts to bounce I still have almost 2 inches of throttle left but get no response.
Any ideas would be greatly appreciated thanks in advance