tac help

[Albysure]

98 seadoo sportster 1800. Right side tac when out today while driving then back about 5 mins later then off again at some point just stoped watching it. You think tac just went bad? What should I check?....thanks

 

[Dr Honda]

It's probably just the Tach. Is there any moisture in it?

BUT... you should check the wiring in the helm.

 

[speedster98]

One of the tachs is out on my boat too. I checked the wiring by swapping tachs and everything was ok. Replacing the tach is a no go with it costing 250 new and lowest I have found on ebay is 125. I installed a tiny tach instead, plus it adds an hour meter.

 

[Albysure]

Thanks for the replys. No moisture in it and the owner before told me he just replaced that tac. I'll check wiring in the helm like u said and also swap tacs n see what that does......thanks

 

[Dr Honda]

You may have to check the wires going the entire way back to the engine. It may just be a corroded connection.

 

[Albysure]

Thanks....when I get back today ill check all connections. What's at the end of the run? How does ghe tac read the rpms? Would there b some kind of sensor? I'm not familiar how it works...how the tac reads it...

 

[Dr Honda]

On the 720 engine... the tach is just reading the frequency of the stator coils. (The yellow wires on the engine)