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    '87 Merc 165 3.7 runs 20 minutes dies then hard to crank

    Also I did run it for 30 minutes on the muffs that next day, checked the oil after and absolutely no signs of water in oil
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    '87 Merc 165 3.7 runs 20 minutes dies then hard to crank

    I had no way of checking voltage or anything the night it happened. It was dark by the time I got home and just covered it up until the next afternoon when it cranked up fine. Didn't die or even get warm running on the muffs. As far as the blower goes mine did lower the temp a few degrees after...
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    '87 Merc 165 3.7 runs 20 minutes dies then hard to crank

    @nola mike Hydro lock was my first thought, until it cranked up with zero hesitation next day. No oil in coolant, no milky oil. Going to put it back in the water today. Taking tools, a volt meter, and an IR gun. If it happens again gonna check temps, pull plugs and check for water, and/or check...
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    '87 Merc 165 3.7 runs 20 minutes dies then hard to crank

    @turand Stat is confirmed as a 160° and I only saw 170-175 ish after about a 8-10 minute wot burn. I believe the blower can affect the temp in the engine compartment, which in turn the affects the engine as well. It circulates air through the engine compartment, fumes out=fresh air in=cooler air...
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    '87 Merc 165 3.7 runs 20 minutes dies then hard to crank

    Hell fellow boaters! First post here needing some help. I've spent the last 2 days reading through the forums. Think I have an idea where to start, but would greatly appreciate any experience y'all have. Just purchased '87 Dynasty Apollo Luxury Ski with Merc 165 3.7L Alpha 1 Gen 1. Around 15...
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