Mercruiser 350 Mag Mpi Overheating Club Sea Ray Boat info. 2005 sea ray sundancer 260. engines. 2005 mercruiser 350 mag mpi bravo iii. can somebody please help. my engine overheat alarm keeps going off. it only goes off if i have the throttle above 3400 rpm. anything less, the temp stays normal. i have replaced the impeller, however when i took the old impeller out, it did not have any wear. 350 mpi mercruiser bravo 3 overheating. 1999 powerquest legend 260 sx 502 mag 2005 baja 242 islander 496 club sea ray is the online home for sea ray owners.
Another Mercruiser Overheating Club Sea Ray 3. boat info. sea ray 220 sundeck. engines. 5.0 mpi. so i’m looking for help diagnosing a long term overheating problem on 2006 mercruiser 5.0 mpi bravo 3. here is the story so far. bought the boat earlier this year and it would over heat after about 1 hour of running, after trying a new impeller (old one looked ok though) it still overheated. 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. 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. 321. may 6, 2018. #1. hello, my 2009 350 mag mpi (1a348183) alpha one genii drive, running hot when it is on idle. to be more specific: when running cruise and wot the temp is steady 71 73 degrees c (160 165f) but when returning at the dock and idles the temp raises till 85 88c (185 190f) not more. if i push the throttle to 1000rpm, the temp drops.
Searay 220 Da Re Powered With A Mercruiser 350 Mag Mpi Hi Tech Marine 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. 321. may 6, 2018. #1. hello, my 2009 350 mag mpi (1a348183) alpha one genii drive, running hot when it is on idle. to be more specific: when running cruise and wot the temp is steady 71 73 degrees c (160 165f) but when returning at the dock and idles the temp raises till 85 88c (185 190f) not more. if i push the throttle to 1000rpm, the temp drops. Clean throttle body and plate, test and replace throttle position sensor. sputtering and running on fewer cylinders. engine sputters, loss of power, hesitation. ignition system issues, fuel delivery problems. replace spark plugs, ignition coils, clean fuel injectors. iac motor failure. unstable idle speed, stalling during idle. Feb 7, 2017. #1. 140 hours 3 years raw water cooled 2013 350 mag started to work with high than normal temperatures. used on salt water. depending on the boat load and the rpm temperature is "under control". used to be steady about 163 f before.
My Mercruiser 350 Mag Is Only Overheating Under Heavy Load Under 2500 Clean throttle body and plate, test and replace throttle position sensor. sputtering and running on fewer cylinders. engine sputters, loss of power, hesitation. ignition system issues, fuel delivery problems. replace spark plugs, ignition coils, clean fuel injectors. iac motor failure. unstable idle speed, stalling during idle. Feb 7, 2017. #1. 140 hours 3 years raw water cooled 2013 350 mag started to work with high than normal temperatures. used on salt water. depending on the boat load and the rpm temperature is "under control". used to be steady about 163 f before.
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