96 sport nautique gt-40 overheating at idle

[cody]

hey guys new to site, love the wealth of info, anway prob is: on friday launched the boat (1996 sport nautique) and smelled burnt rubber and noticed the temp gauge was maxed out and the warning light was on. Immediately trailored up. saturday carried boat to local nautique dealer and the impeller looked like an A-bomb was dropped on it. the impeller was replaced along with all new belts. the guys hooked their water hose up and let idle for maybe 15 minutes with no probs. so when i get to lake all is great, several people loaded up and was just pulling a tuber and i noticed the temp gauge was hanging out around 175 and when would idle it would immediately overheat >200. i allowed the enging to cool down for several hours and went back out and as long as i didnt idle the temp wld maintain about 170-180.

ANY IDEAS!!!!!!!!!

[Chexi]

Check your intake scupper and the line leading to the impeller for debris. It could be partially clogged. When under way, the scupper forces water to the impeller. If your line to the impeller or the scupper is partially blocked, you would have the most trouble when idling. Just an idea.

[Mikeski]

my bet would be a bad seal on the strainer

[wskiboy]

i will bet your sea strainer o ring is missing and make sure it is on tight .

[cody]

thx for the help guys. im certain the o-ring is in place regarding the strainer. however, it very well could not be tight enough bc i remember thinkin when i put it on that i didnt wanna tighten it down really hard!!! hopefully will get to go out next weekend

[crkdskier]

Coolant Flow

Where did your debris from the bombed out impeller end up? If your still having problems give your thermostat housing a peek, there's only so many places that could interrupt your coolant flow...For reference My 91 Sport runs around 175 180 during normal op, if I idle too long it will climb up towards 200, and a few seconds at a high idle in neutral brings it right back down...
--J