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Volvo Penta AD41B Tach Problem

L

Lee Walters

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"The Tach on my Starboard engi

"The Tach on my Starboard engine has started to run erratically the last few trips. Will read well at idle, around 800RPM, but as I open up the engine to trolling speed if bounces around between 1500 and 3000 RPM. It will then sometimes resolve and work well for a while, then start bouncing around again throughout the day. Engine is running smoothly a consistant. The altnators were replaced in June, and are charging. could this be just a bad connections or a actual problem with the tach?"
 
Tach problems are common with

Tach problems are common with older ad41 engines. I had exactly the same problem you described. I changed the tachometer for a new one after consulting with few mechanics - all claimed that a new one would be the only cure for the problem.
 
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