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Yanmar’s advice/recommendation for the L70AE (similar to the N, V, or W engines) is to break in using the regular, recommended oil viscosity meeting at least the minimum API-CJ4, ACEA E6, and JASO DH-2 service categories found in the operating manual (the attached manual applies to the L70AE...

Yes, why didn't I think of calling Yanmar directly? Duh...guess I always try to do things the hard way. I appreciate the advice. I will call tomorrow for sure.

Interesting - I went and grabbed my Yanmar L-A operation manual - and it says to follow break-in procedures for the first 20 hours - and to avoid heavy loads. But I can't find any mention of "special" break-in oil. I may have seen the 100 hours and arguments about oils in these forums. Also...

So, after two years, finally got my MEP-016D Yanmar engine rebuilt - I procrastinated getting it to the machine shop, and then the shop took forever. But, got the rebuilt engine back and reassembled the generator. After struggling for a short while with non-start and then backfiring, I found a...