I have a 2002 Yamaha 50 4-stroke that I recently purchased. Yesterday we were hooking up the power and neutral to the battery and crossed them… Yeah yeah I know that’s bad… anyway it blew the 15 amp buss fuse, so no power. Well the only fuses we had with us were 20s, so I swapped in a 20.
I had to swap trailers so it was only going to be for a little while. Motor fired right up and I backed it away. After a little while (10 mins) the alarm went off. I shut it down and checked everything. Motor was peeing, didn’t appear to be hot, running good.
So the question is would the motor sensors detect the difference in power draw and set off the alarm as a precaution or do I need to dig deeper.
I thought about this a little more. If the starter isn’t engaged it wouldn’t be drawing more than 15 at any point. Could the sensor still detect the difference??
It sounds like it could be a little more of an issue. Any ideas…
Chris… I only know of 1 fuse… are there more? I looked in the manual and it only reference the one in-line.
Also the manual says that the fuse should be 20amps. I haven’t owned the motor since new, so this is why there was a 15 I assume.
The boat doesn’t have a temp gauge, and I don’t know if there is a sending unit set up to install one.
I was looking at causes in the manual for the alarm to sound, and noticed that there is one for undistributed load. Have you heard of this? I have never heard of anything like that, but I guess I can understand it if the motor is out of balance.
The boat was and is undistributed weight load wise. It is on a jon boat with very little weight at the front, not to mention I was barely past idle, so it was cocked up and plowing.
I don’t think it was overheating… The motor was peeing good and it wasn’t running for more than 4-5 minutes tops. I have had intakes clogged for much longer than that and not overheat.
