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**Alan Wheeler** · 03-06-2006, 13:35

PLUS replace the Air filter while your at it. It MUST be clean. Especially if it is perhaps on the slightly small size to begin with, and that tends to be a common problem in boats, due to lack of room.

Meridian · 03-06-2006, 21:05

Mark...I may be able to help. I am currently outfitting a new Tayana 48, and have been in contact with a number of other t-48 owners across the country. Several of them have reported that their 4jh2-dte's have been overheating (they have the 88 hp turbo version...is yours the same?). Anyway, I have held on to all their e-mails, and can forward them to you off-line. I'm sure they would be more than willing to help you through this...as I recall, one of them just made some modifications to the heat-exchanger which seemed to help tremendously.
Anyway, hit me off-line if you're interested in reading their travails...
John

markpj23 · 04-06-2006, 06:35

Thanks Pat - I'll start with that and see what it gets me.

And I thought I was the only one who had to worry about heart attacks... who woulda thought my boat could suffer one too??

Yellowjacket · 20-04-2017, 19:12

I had same problem on same model engine. Turbo clogged with debris after belt failure, which led to clogging of intercooler, all of which led to maxing out at about 2000 rpms, huge amount of soot everywhere, a substance in the water near the exhaust that looked like I dumped a bucket of black paint off the stern. It's better, now, after all of the above repaired and an injector serviced.