Tach stops climbing at 2900rmp but the boat revs....

[LFTDJEEP]

I just bought a 2002 Glastron SX195 and when taking it out last Sunday, the Tach reads fine and what seems to be accurate from idle up to 2900 rpm (approx) and even though the boat revs out the tach never climbs.

Any thoughts?

 

[jeff_smith_0423]

Re: Tach stops climbing at 2900rmp but the boat revs....

Had the same problem with an old Merc inline six. Swapped a new/used known good tach in and it solved the problem. However - verify that your tach is set properly for the number of poles on your engine.

 

[j_martin]

Re: Tach stops climbing at 2900rmp but the boat revs....

Most likely a mechanical bind inside the tach. Maybe the glass got pushed in and is interfering with the needle.

hope it helps
john

 

[Bondo]

Re: Tach stops climbing at 2900rmp but the boat revs....

Ayuh,... I'd start with another Gauge as Well....

 

[JustJason]

Re: Tach stops climbing at 2900rmp but the boat revs....

Heck I use a spare autometer gauge I have in my box to test for bad tach's. So if you don't have one to test the old one with, looks like your buying 1 either way.