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    Thermostat GLM13230 OEM # 87290A4

    I replaced my engine with an ATK rebuilt and a new SEI106 Lower unit. I have new risers, manifolds, circ pump,and new thermostat with T valve and check balls. Started the boat and temperature went to 200, verified this on hose and in the lake. I pulled the thermostat 140 degree, and ran the...
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    Mercruiser 200 V8 Alpha 1 MR Drive

    Getting antsy for the salmon season, so I started to pull my lower to put a new water pump in. And, the plastic tube that helps line up the water intake was melted. Looked up into the top half, and the water pocket had signs of heat/some melt from the outside. Gasket was okay and seal were...
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    Mercruiser 305 V8 running hot at low RPM fine at Speed

    New Impeller, water pocket is good. New Thermostat 140 degree, installed correctly. New temp gauge, did not install the new temp switch. Hit the fresh water lake while making my way out to the lake the boat temp was about 180, over about 30 minutes it started to creep up to 230. Give it some...
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    Mercruiser 200HP 305 CID V-8 Normal Operating Temperature

    I have the service manual for this engine. NO where in the service manual or anywhere on this forum, am I able to find normal operating temperatures for this engine, or something similar. Here is the question. What are considered normal operating temperatures for a 140 thermostat and a 160...
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