Motor Runs New t-stats but still over heating?

[MercBlackMax1]

Re: Motor Runs New t-stats but still over heating?

I'd use the Seloc manual........ in the back house.

Look up your manual part number in mercury's online parts service by your specific engine and serial number. Then look for one at Amazon or eBay. They're pricey, but you won't be tempted to wipe your ....... with it.

Usually the only things that go wrong in the carbs are gaskets and crud. Other parts, like needle, and float can be inspected and replaced if needed, which would be rare. Gasket kits are about 8 bucks, 3 needed, plus 3 carb base gaskets at about a buck each. You can re-use the horn gaskets, they aren't critical. Spray can carb cleaner is fine for the job.

I just noticed the year of your engine. The original floats might have been foam, and the new fuels sink them. If that's true, find a set of used WHnn carbs off anything V6 from 135 hp up and 1988 or later to get the floats. They are NLA, and I don't think there's enough market for anybody to make aftermarket ones. One company put up a part number, but never actually made any. If your floats are hard plastic, yer golden on that point.

The WH series carbs are very simple. If you pay close attention to details, including torque order on the bowl, you shouldn't have any trouble going through em. Maybe buy an extra gasket set. If you have to go back into a carb after it's torqued, you should replace the gaskets again.

After the carbs are rebuilt, you need to go through the linkage and timing adjustments. It's pretty intimidating for a newcomer, but actually not difficult. There's just a lot of steps that don't make sense until you go through it a couple of times.

You do need to get yourself educated so you can at least identify the parts on the engine.

Yea tell me about it, i know alot more about the motor now than i did a week agoo. I just looked at the bills for repairs that the previouse owner had done. The carbs where inspected and on float was changed in may 2010 so i figure the carbs should ok.

back to my over heat today i ran the boat for 10 minutes and it sat nice a pretty at 180- 185 degrees and then it just shot up super fast to the end of the guage that cant be normal it doesnt just shoot up 100 degrees in 2 seconds ??

i deff do not have anyhing that looks like a horn for over heat under the dash, and i blew air in the psi gauge today and the dial moves but when i plug it up to the motor i dont get a reading.