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Are you getting blowby during operation? Should be a vacuum in the crank case during operation

I can second Biobor JF.. Good stuff and a little goes a long way. We use it at work to treat and prevent microbiological growth in our jet fuels. You might want to check out Lubribor as well as a lubricity additive as well.

I've been scouring all of the various Lister Petter documents, the MEP / DN4M pubs and have been looking to put the engine back together using the data I can come up with. I'm going with standard engine build guidance; i.e., 45 degree crosshatch and plan on running the engine with a varying...

I got the piston and ring assemblies off of the big auction site, they came as an assembly with piston, rings, wrist pins, and circlips. They are from an FG Wilson generator distributor down in Miami, FL and they had a different part number. They are OEM Lister Petter LPW pistons for a...

Hello all, as mentioned before I'm in the middle of replacing a few pistons and all of the rings in my MEP-803. A question for the group. Would you run Break-In oil for the first 50 hours or so of operation while the rings get seated. Note, this isn't a complete rebuild, but I'm trying to...

Don't know if you found the info in the Onan book, but here's the Stanadyne spec sheet link. http://www.stanadyne.com/dealerportal/ssi/specification_sheets/31539.pdf

When you guys installed the bulkhead fitting, what are you torquing the nut to?

It's in OK, serviceable condition as a whole, dirty and dust, especially up behind S8. The unit must have had something dropped on top of it, so I had to straighten out the top panel a bit and work to straighten out the hinge for the control panel cover, but all was working before I tore it...

CSHeath, you're absolutely right. I misplaced my decimals absent mindedly. My ring end gaps are within the .010-.015" range.

mid-day update. I think I may be cracking a bit of the code on the 751 series part numbers. From some additional research, it appears that the 751 series L-P part numbers cross over into Lister Petter built generators, as well as FG Wilson generators. It looks like I'm going to go at risk and...

I sure have downloaded all of the manuals and studied them at length. To clarify; the unit that has the broken pistons doesn't appear to be a reset unit, with all original hours. I need to get some new batteries for my outside micrometer to confirm, but a standard sized set of rings dropped in...

Hi all, name is Nick and I'm based in central FL. I purchased a couple of MEP-803A generators, 1 with 7k on the clock, and one with 9k (reset 2010 and put directly into storage, don't think MCB Albany changed the Hobbs meter out, but it's pristine and I got it for a smoking price, considering...