Originally Posted by
Baitwaster
is this yours? C60ELRY
I cant find any oil related parts for this model (except trim pump). Ebay has a mechanical injector for a 4 cyl yammy which does not fit yours but looks like it might be something that can be disassembled, inspected and possibly rebuilt.
Are you sure your oil is not vacuumed by the carbs? I don't think I've ever seen this and sounds like an awful idea because if the lines got a little bit clogged the engine wouldn't get sufficient oil, but then again if this IS how yours works then it could be your problem.
I dunno, oil is probably not the problem. Sounds like you've been through all the potential water problems.
That leaves electrical. So bad sensor which you swapped. Its possible you swapped in a bad one but not likely.
It could be the wrong sensor.
There could be a problem in the sensor circuit. The sensors basically change resistance with temp change (thermistor is one way). There are two types where R (resistance) rises with T(temp) and one that decreases. We don't really care which one you have, but I think yours might rise with T. So we need to look for conditions that could trick your computer into thinking that R has increased above normal operating temp.
Corrosion is the first and most obvious symptom. Check inside all the wiring connectors. A nick in wire insulation allows moisture to enter and slowly corrode the wire internally and is almost impossible to spot, usually the wire will harden though. I would run nice new temporary wires if at all possible (try to match the wire gauge) and or measure the existing wires for resistance, which should be close to 0 ohms, anything under 15 ohm would suggest its ok.
The computer (or simple alarm circuit) may be at fault, either by corrosion, or weak parts. All electronic components are rated to be accurate +/- of spec to a certain percent (100 ohm resistor may actually be 95 ohm). With time, components become further out of spec. This is why a perfectly good radio that was buried on a shelf in the back of a store room might not work when its finally dug out. (your stuff is 20 years old (mine too))
It wouldn't hurt to inspect all your battery connections too. This includes the connections inside the motor, fuse panel, etc. A poor ground could mess with the computer.
Is it safe to say I'm interested in this? Keep us posted.