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Engine Alarm - Cooling Issue
jklein
Member Posts: 49 ✭✭
Happy 4th Everyone.
Clearly based on this post it wasn't a "happy boating 4th" for me.
I have been chasing down an engine alarm for 2 weeks now. I believe it to be a cooling issue...
I have a 2006 250EC with the Mag 350 Mercruiser. About 2 weeks ago after boating over something floating a few inches below the surface (no wake speed) I started to hear an engine alarm at higher RPM's. The horrible Faria gauges show that my temp is approaching 200 degrees when the alarm goes off. Thinking this was clearly a cooling issue I had the mechanic come out. He attached the computer and was perplexed. He saw the alarms listed on the computer, but he said the numbers "were all good and in range?" Hence he thought a bad sensor...
Replaced the sensor and assured me the boat was set for the 4th weekend.
Packed up the family including the 8 month baby girl and headed out. Didn't make it 5 minutes on a plane without the alarm sounding and the gauge reading close to 220 degrees. I idle sped back to the dock.
I am running the Bravo 3 - I had my cooling assay replaced 2 years ago...
Any feedback would be helpful. Thanks in advance.
Clearly based on this post it wasn't a "happy boating 4th" for me.
I have been chasing down an engine alarm for 2 weeks now. I believe it to be a cooling issue...
I have a 2006 250EC with the Mag 350 Mercruiser. About 2 weeks ago after boating over something floating a few inches below the surface (no wake speed) I started to hear an engine alarm at higher RPM's. The horrible Faria gauges show that my temp is approaching 200 degrees when the alarm goes off. Thinking this was clearly a cooling issue I had the mechanic come out. He attached the computer and was perplexed. He saw the alarms listed on the computer, but he said the numbers "were all good and in range?" Hence he thought a bad sensor...
Replaced the sensor and assured me the boat was set for the 4th weekend.
Packed up the family including the 8 month baby girl and headed out. Didn't make it 5 minutes on a plane without the alarm sounding and the gauge reading close to 220 degrees. I idle sped back to the dock.
I am running the Bravo 3 - I had my cooling assay replaced 2 years ago...
Any feedback would be helpful. Thanks in advance.
Comments
changing the the impellor is hard. So little room between the engine and transom wall. I changed the impellor 2 years ago. Is it common to go bad this fast? Could it be anything else? A thermostat maybe?
Dream 'Inn III -- 2008 400 Express
2002 FV 342 on Lake St. Clair - Past Commodore SHC - Vessel Examiner USCGAUX
if your running fine at idle, and it only over heats when you try to get on plane, i would check your sea water strainer. i sucked up some mud in mine a month or so ago and it gave me a fit for about a week until i figured it out. i pulled the hoses off the power steering cooler, and all the fresh water hoses, heat exchanger, and flushed everything out.
here is a link to the issue that i had. good luck
http://rinkerboats.vanillaforums.com/discussion/3708/over-heating-issues#latest
Based on the picture I'm assuming it's an obvious part? Is my mechanic way off? Do some versions of the mag 350 not come with one?
most importantly where would I find it?
If you have one, there will be a thru-hull fitting with a shut-off valve near the keel in the back of the engine room. The strainer would be an 8" diameter metal can with a glass top and two rubber 1-1/2" hoses attached to it. It would be pretty easy to find, so I'm guessing your mechanic is right and you don't have one.
following up with my mechanic he said, "only closed cooling engines have the second pickup?" My boat is raw water/sea water cooled and I only have the out drive pick up.
I will absolutely look again but I think in my engine compartment the only thru-hull opening I have is the one piped to the head.....
thsnks again
Dream 'Inn III -- 2008 400 Express
PC BYC, Holland, MI
PC BYC, Holland, MI