Mercruiser 350 Mag Mpi Overheating Club Sea Ray Overheating 350 mercruiser mpi bravo problem solved, dennis allen of affordable marine service in san diego california in january of 2020 . final s. 338 posts · joined 2008. #1 · may 23, 2011. i have an 08 boat with a mag 350 mpi, bravo 3. boat is serviced regularly (impeller changed annually). last year it started doing something odd at the beginning of boating season. randomly, it would get hot, the alarm would go off because it was getting hot. it never did it before.
Download Mercruiser 350 Mag Mpi Service Manual Dennis allen of affordable marine service explains mercruiser overheating problem solved. listen to and watch this short clip on how we traced a very rare ov. Jul 23, 2011. messages. 48,819. mar 6, 2014. #4. re: mercruiser 350 mpi overheating problems. if you do not have a thermostat, you will at a minimum need a restriction orifice. i would put a new thermostat in, flush out the motor, lines, oil coolers, and check your raw water impeller. Reaching out for help to diagnose a low and high rpm over heat. high overheat occurs above 3500 rpm when at this speed for more than 3 4 minutes. low overheat occurs at lowest idle, 600 700 rpm, when at this speed for 10 minutes. when engine is increased to 800 rpm the temp cools down below 175 degrees. no overheat issues between 800 rpm and. Hello group. i have a 2007 260 sundeck 350 bravo 3 that has a partially collapsed raw water pickup through the transom. i have replaced the water pump impeller. thermostat. circulating pump. seems like it's not getting enough water through the transom from the lower unit. even at an idol i see.
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