faulty tacho help

[Xk59D]

hey folks,

i've had a good few hours already this year on my boat. all is going well apart from a couple of niggles.

next up on my todo list is my erratic tacho (quicksilver 8000rpm). it vastly over-reads what the engine is actually doing, i have seen it well over 8000rpm at cruise on my mariner 4 stroke outboard....EEK :-)

i have no idea where to start with this one, look to bend your ear folks.

the outboard is a 100hp 2006 mariner 4 stroke EFI if that helps.

cheers

[stul]

Hi
No electrical expert ,I had my taco stop working tried all the connections at the gauge end, then when it was going dusk took cowling off outboard and saw spark,s jump around the starter area to top of engine.
Next day cleaned up tidy the wiring checked connections where good after that all good ,this did not just take one lucky night to discover but a few attempts look for bad connections poor wiring
My engine is 75hp mariner made in 2006 not done a lot of hours but an outboard vibrates and things come loose .Hope this helps (the looking at dusk is perhaps a good tip) but don't get bitten by electrics
Stuart