suzuki dt90 tach bouncing up&down

[rivercat49]

I have twin 90 hp. suzuki's. The tach. and sychronizers bounce up and down while underway but engine is holding consistant rpm's I have checked all electrical connections with no luck. this is only happening on the starboard engine. thanks

 

[marinegrh]

Re: suzuki dt90 tach bouncing up&down

check the connections again, if you still cant find anything wrong, check your grounds, all of them, could you be getting a voltage spike causing the bounce, suzuki has made quality gauges and very rarely do i hear you problems, <br /><br />good luck and keep us infoed <br /><br />[fair winds and following seas]