Temp spike on shut down

definitely a grounding issue. but just pulling the neutral safety doesn't mean its safe. many boats still have their prop shaft turning slowly when in neutral. our Martinique does it often. and my uncle Martinique with the slightest rev his prop shaft will turn. so it is a good idea to cut engine when someone is near the ski deck

I agree with Don on this on both counts. The late 80's SN are notorius for having Gnd issues. If I look down to check the gages and I seem to running a little hotter then normal I'll turn the nav lights on, peg the needles to the right then turn it off and watch the temp gauge drop 20'F or so. Most do it unless the gnd issue has been addressed under the dash.

I think killing the engine is a bit overkill everytime someone gets near the platform. If it's just a matter of changing out skiers, or picking one up cause it's time to run down the lake then I wouldn't worry about it. I've been doing it for years and it's never been a problem. The prop is a good 4Ft back from the edge of the platform and at an angle with a rudder in front of it as well so you'd REALLY have to be reaching for it with your feet to hit it. Good habit to pull out the neutral knob though while some is back there. I'm still trying to make that a habit myself if I'm gonna get out of the drivers seat and the engine is running. I definately need to change that one.

yeah cc's wiring is very evil. luckily they put in two terminal blocks in our Martinique. one was barely used for a aground and the other had 2 wires on it(for the radio). So i set up a positive terminal block and a ground one. now the gauges barely move if i turn something on and the lights barely dim when they come on and something is running. I am surprised at how horrible it was. But cc makes boats. Not good electrical setups :P

89Martinique wrote: many boats still have their prop shaft turning slowly when in neutral. our Martinique does it often. and my uncle Martinique with the slightest rev his prop shaft will turn

Dirty neutral

Electrical gremlins confirmed. Tonight on the lake did a little experiment. Only ignition switch on, temps fine, no spike on shutdown. Turned on Nav lights, as soon as engine off, needle starts to climb. As soon as nav light turned off, needle back to normal.
Looks like I'll be crawling around under the dash in the near future to rewire ground
Ron

BTW - noticed your username is Ultrarunner - see you in Vermont July 21?
Ron

+1 for engine off anytime some one is on platform or climbing onto it.

My kids wouldn't have it any other way.

Helps with not breathing CO also.

There really isn't a reason to be in a hurry anyway, out there to relax & have a good time.

Our 96' will heat up a bit when shut down. As soon as she is fired back up, temp goes back to normal with the fresh circulation of water. I always lift the doghouse when we are going to relax for a bit after some runs to let her cool down to. I also shut it down any time someone is getting on or off the platform. Better to be safe than sorry.