tomsboat
Senior Member
I'm going to have 1000 hrs on my Yanmar 6LY3STP 440 hp engine should I have it serviced before my winter storage or for my spring commission for the 1000 hr service ? Tom
I'm going to have 1000 hrs on my Yanmar 6LY3STP 440 hp engine should I have it serviced before my winter storage or for my spring commission for the 1000 hr service ? Tom
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You can easily check this yourself by lifting the dipstick and dabbing a tiny amount on your finger and tasting the oil, if it needs servicing you will taste the oil is slightly acidic, now try it with a little new oil. Taste the difference.
It be a old fashioned crude check and the young 'uns may well laugh, but it sure as hell works.
Waste of good oil. There is no acid in the oil unless it has been run for hundreds of hours, like maybe 500 hours. That's why diesel oil starts out high in TBN. It's in the additives. Until the TBN is reduced to less than two, there is NO acid in the oil. The idea that changing the oil at layup cuz there is acid in the oil is poppycock. Said with all respect.ALWAYS ALWAYS service your engine at the end of your cruising season.
The reason is that during the start up process the engine passes through a short temperature range that produces tiny amounts of acid.(which is why you're advised to start your motor and run it under a light load so it reaches operating temperature quickly).
Once you've serviced your engine the working parts will be bathed in clean oil over the winter months preventing any premature wear.
You can easily check this yourself by lifting the dipstick and dabbing a tiny amount on your finger and tasting the oil, if it needs servicing you will taste the oil is slightly acidic, now try it with a little new oil. Taste the difference.
It be a old fashioned crude check and the young 'uns may well laugh, but it sure as hell works.
I was taught at Rolls Royce diesels and I fully agree that things have moved on in oil additives especially over the last 10 to 15 years or so all I can say in mitigation is that we've never had to strip an engine down or replace one either in our families fleet of trucks and certainly not in any of my playthings. Each to their own I guess.