I have the Mercury shop manual for my motor. I should just look up the diagnostic procedure for this shouldn't I? I'll attempt to remember to have a look this weekend. more
See full version: Inconsistent and inaccurate readings from tach
I have the Mercury shop manual for my motor. I should just look up the diagnostic procedure for this shouldn't I? I'll attempt to remember to have a look this weekend. more
as for the charging system - i replaced the regulator and rectifier last year, so unless there is something else going on. stator maybe?
What you're describing is a flaky connection in the tachometer itself. If there is a poles selection switch, that would be the most likely cause. Determine which position it is in , then rotate it through it's entire range several times, then put it back where you found it. It would be a screw slot driven switch on the back of the tach. here
Now my motor has completely died. I finally pulled it out of storage a couple weeks ago. It fired right up but would only idle on one cylinder instead of two. I had spark to all four cylinders so I pulled my carbs and cleaned everything up. No evidence of any blockage in the carbs so I pulled the upper reed blocks. Again no sign of a problem. While I was picking up the read block gaskets at the local Mercury dealer I decided to buy new spark plugs. I was confused when he gave me standard plugs instead of surface gap and he told me that they changed the spec to normal plugs a long time ago. Whatever, I put them in and fired it up and she purred like perfection in my driveway. Fast forward one week later, I'm at the boat ramp and. nothing. not even a hint of spark. This is the first time my engine has completely let me down. After throwing a few things I calmed down and started doing some basic checks.
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I Have Four Wires Coming From The Trim Sensors And Only Two Plug Ins Wiring here
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Wiring Electrical Questions For Trim Other Gauges And How To Add Aux Car Charger Ifish Fishing Forum
You can locate the MerCruiser serial number label on either the side of the engine or on top of the flame arrester cover. here
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