"Hi, I have a 1999 Crownline 2
"Hi, I have a 1999 Crownline 225 with a 5.7 250 HP Mercrusier & Bravo III. My Tach was working ok last year at end of season. I have done several winter project this off season including Installing an Amp for the stereo and a Corsa Captains Call exhaust. Upon taking the boat out for a test drive and checkout run my tach is reading funny. It is reading high. Idle is reading 1100 RPM compared to last year of 800 RPM. The boat is reading 3900 RPM at 30 MPH compared to last year of 3300. WOT with the exhaust closed is reading 5300 RPM compared to last year of 4800 RPM. While crusing through a slow speed area and the motor at a constant speed the Tach would fluctuate between 1200 and 1800 RPM. Have I pulled something lose or got a lose connection somewhere? Is there a wiring diagraham that I could follow and check this out?"
"Hi, I have a 1999 Crownline 225 with a 5.7 250 HP Mercrusier & Bravo III. My Tach was working ok last year at end of season. I have done several winter project this off season including Installing an Amp for the stereo and a Corsa Captains Call exhaust. Upon taking the boat out for a test drive and checkout run my tach is reading funny. It is reading high. Idle is reading 1100 RPM compared to last year of 800 RPM. The boat is reading 3900 RPM at 30 MPH compared to last year of 3300. WOT with the exhaust closed is reading 5300 RPM compared to last year of 4800 RPM. While crusing through a slow speed area and the motor at a constant speed the Tach would fluctuate between 1200 and 1800 RPM. Have I pulled something lose or got a lose connection somewhere? Is there a wiring diagraham that I could follow and check this out?"
