Perkins 4236m

[Neptune 19]

Hi all I'm new to this so if it's in the wrong place I'm sorry.
I have a perkins 4236m90 and its running at just below 100 degrees even if it revs are at 1200 or 2400 I cleaned out the cold water inlet and put a new impeller in every time I have to fill the header tank with about half pint of water but she starts on first turn and never miss a beat any ideas where to start or is this normal for these engines. Thanks for your time and knowledge.

 

[Ferris]

We have one, very tough engine imo. Was the mainstay of the massive hire fleet on the Shannon navigation in Ireland.

Not sure on the 100deg temp, I think ours runs 80-90degC. How accurate is your gauge? Maybe borrow an IR heat gun to validate? I would say a half pint is maybe a bit much - maybe overfilling and it’s just getting chucked out the overflow. When I check the level in the header tank I just make sure that the level is maybe max 1” below the cap.

I had an overheat when an impeller broke up and proceeded to dump all the bits into the heat exchanger - that was a right b****ard to fix. Maybe this has happened on the past with yours? If yours is a seaboat is the HE scaled, people on here flush with Brick cleaner to remove.

 

[Neptune 19]

Thanks Ferris for your response it's only fresh water . how did you clean out the hater exchange. you say it was a night mare.

 

[dava]

Not entirely sure about Perkins but my experience with fords is to find the thermostat and bin it!! I've had far too many fail or block up with salt/ fine weed! I know people do say that an engine should run at 90° but I prefer them much cooler.

 

[Ferris]

Thanks Ferris for your response it's only fresh water . how did you clean out the hater exchange. you say it was a night mare.

We had to take off the water pump and the pipe work up to the HE and then fish the bits out from the inlet. Great fun!