Re: Normal Operating Temp?
Find the temp sensor and remove it and see what it is measuring. It's most likely under one of the top spark plugs (measuring metal) but make sure of that... No problem removing it. If it's not there check the water lines, or at the top of the block (measuring water). One single wire will lead to it, mine is colored tan with a blue stripe. That wire goes directly to the guage.<br /><br />If you are measuring water temps, 200F is way too high. And since it happens at lower rpms, I suspect the poppet vlave is stuck open. It is located just under the switchboxes on the bottom starboard side of the block. It's an egg or eight shaped plate held with a few bolts. Under the outer plate is a gasket, diaprham, another plate, another gasket, poppet valve with a spring and some grommets fixed to the block. Remove all but the grommets and check for debri that would keep it from closing. It's designed to stay closed under 2500-3000 rpms and open at higher rpms to release water and reduce pressure. If it is stuck open at low rpms, you are dumping needed cooling water out of the block, causing it to overheat.<br />You should also replace the impeller, so you know that it is ok. You will have to pull the lower unit off to get to it... Do a search on replacing impeller. A manual is in need if you haven't done this before, but it's not very difficult.<br /><br />Are you getting an overheat alarm?
