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Old 18-07-2014, 08:19   #1
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4JHE zincs

Does it have any? I can't find reference to any in it's manual, and I can't find any on the engine. Does it just not have any? How come it doesn't need any , assuming there are none?
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Old 18-07-2014, 08:53   #2
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Re: 4JHE zincs

There are no zincs in the 4JHe series. Some say there's a zinc in the oil cooler but there is no zinc in the OEM oil cooler. They will be paper thin in 2000 hours. ($600 for Yanmar oil cooler!)
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Old 18-07-2014, 13:15   #3
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Re: 4JHE zincs

Thanks,
Just thought there should be a zinc, just couldn't find one, then got to thinking, maybe it isn't supposed to have one?
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Old 18-07-2014, 15:04   #4
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Re: 4JHE zincs

We have a 4JH3E. I searched everywhere on the engine, in the manual, and finally called Mack Boring before really believing that there is no engine zinc. I do have large zincs on the SD50 and prop. I was told that the internal flow parts were resistant to corrosion / electrolysis !!!!
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