2 weeks ago - last edited a week ago
The 4 service lights on it work (No oil, hot, check engine, no oil etc), but no sign of the revs moving. Worked fine last year, but nothing since the winter and it being serviced at an authorised dealer who plugged into their system etc.
Perhaps the service was a coincidence?!
Tried tapping/ leaving indoors etc to dry out. Checked all the various wires/ connectors etc but can't see anything loose or out of place.
Is there anything on the engine end to check specifically?
Anyway, is there anyway I can test the 8 pin plug that goes into the back of it with a multimeter? If so, which pins and what should I expect from each?!
It's not a digital rev counter by the way - has a mechanical arm.
a week ago - last edited a week ago
The quickest way to test the gauge is to temporarily plug in a known good gauge. That would tell you right away if it is a gauge or wiring issue.
Actuate the 5 and 6 pole PUL / REV adjustment back and forth in case there is a bit of corrosion on a contact. The final setting should be on 6.
A dealer can hook up his or her laptop and see if the engine is generating a tachometer signal and an ohmmeter can be used to check the wiring from the EMM to the guage connector to make sure it is continuous. Since the lights work, the gauge has the required power and ground circuits operational.
a week ago
Thanks for that - can't seem to find a gauge to switch it with unfortunately.
Good plan on the 5 and 6 pole - will try that. Sadly i'm not with the boat for a few weeks now so might be a while before I can revert back with results... just trying to come up with a list of things to try!
Out of interest, is anything disconnected when they plug in their laptop or do they plug into a blank port? I wonder if they can of distrubed something during the service?
a week ago
If you want to check, unplug and re-plug in the two 6 -pin connectors at the engine where the boat harness attaches. Look for a bent, broken, or deformed pin on the gray wire in one of the 6-pin connectors as that is the tach signal. It is in the connector with the 4 brown or tan wires.
a week ago
The laptop access point is a special triangular plug, 3 wires, red, black, white.