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Old 23-03-2011, 15:27   #16
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Re: Perkins 4-154 Overheating - Freshwater Side ?

Can you supply contact info for JT Services?
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Old 23-03-2011, 18:17   #17
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Re: Perkins 4-154 Overheating - Freshwater Side ?

Tim@JTServicesinc.com
I don't have the phone number with me right now but will post it when I get home
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Old 23-03-2011, 21:20   #18
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Re: Perkins 4-154 Overheating - Freshwater Side ?

google JT Services Minneapolis. they're there
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Old 16-10-2013, 07:32   #19
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Re: Perkins 4-154 Overheating - Freshwater Side ?

The suggestion of checking the mixing elbow is a good one. I had similar problem with the 4.154 overheating (not as extreme) and the root cause was an internal epoxy repair to the mixing elbow. A new one is about $90.
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Old 30-03-2016, 07:29   #20
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Re: Perkins 4-154 Overheating - Freshwater Side ?

Re-reading this thread - I'm sure at some point I've read it before. My 4.154 runs about 190 at the thermostat housing and the gauge when I run the engine up above 1200-1400 rpms. When I hold it to 1200-1400 the engine runs 185 or so, and many years ago it used to run 180-185 at all engine speeds, even when cruising at 2000-2100 rpms. Now at those speeds the temp is 190+.

The recommended range, if I recall from the manual, is 167 - 193. Since 190-191 is less than 193, do I just run it and ignore it (actually, I would pay attention, and I have an overheat alarm that works)?

Thanks.
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