Tach quit working

[Mike Watson]

I have what I think is an odd one. I have a 1997 Seadoo Speedster with twin 717. This weekend I pulled out the speedometer because it doesn't work and I'm going with a GPS speedo. After I got it out I decided to fire up the boat to make sure everything else was working. The left tach works fine but the right tack just slowly crawls up to 5000 RPM and just stays there. When I shut the motor off it returns to zero. I looked at both connectors and the are plugged in. Any ideas? The tach worked fine before I started the speedo removal.

 

[Scottintexas]

I don't know the answer and am really just bumping this up to the top of the "new posts" section that many members visit in hopes somebody smarter will reply,

Have you tried to swap the connectors to see if the problem will follow to other one to help pin it on the engine/relay or the tach itself,

 

[Mike Watson]

That was my next move. Thanks.

 

[Mike Watson]

It seems that there are to sets of wires to each tach. The connector with just 2 wires must be the signal. The right tach doesn't work but when I move that signal wire to the left tach and the left tach works fine. Must be the gauge. Does anyone out there have a 1997 speedster or sportster tach they want to part with?