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Jamawieb is correct, it is left hand threads. Took mine off a few months ago to check the timing on my 803a. It is on there tight! I had to use a three foot cheater bar on a half inch breaker bar (could not get the impact gun on it).

Sounds like your pressure valve is working fine. Since you said the flap was missing it water could have gotten into some of the cylinders. The cylinder walls may be rusted up and the rings may be sticking. Here is what the manual says about crankcase pressure: A fluctuating vacuum may...

On my engine I saw no signs of water intrusion on the top end. Cylinders were clean, no rust on the top end whatsoever. The only place I saw rust was at the oil filter, on the threaded tube where you spin the filter on. I think water entered through that hole and settled in the pressure...

I took the side cover off to access the oil pressure relief valve. I don't think it is possible on this motor to take the front cover off to access the valve. The valve is screwed into the oil pump next to the oil pickup tube.

Just got everything put back together today and fired up the genset. Motor ran great with between 50-55 psi oil pressure, generator produced power and everything works fine. Hopefully this thread will help someone if they experience the same problem that I did. Thanks for all the help!

Found the problem! First I took the front cover off the motor and checked the cam timing. Marks on the crank gear and camshaft gear were dead on, so not the problem. Checked the valve spring pressure at the installed height, it was 45 lbs (does anyone know what this value should be?). Did...

Update with pics! The lifters were taken apart tonight and all look good. The oil was not as thick as I remembered it, so I don't think that is the problem. All valves were removed and came out easily, no binding. The valve with the bent push rod was only out by .001", put blue sharpie on...

I don't think the lifters are collapsing. If they were the engine would not freewheel. It was freewheeling like a gas motor with no spark plugs in it. Compression would return when you let the engine set a few minutes. I am going to take apart every lifter and inspect/clean them. The...

Update! I pulled the head off tonight. Every single valve kissed the top of the pistons. They did not crash into them (no mark on the piston or valve) but you can see the imprint in the carbon (I have pics I will post later). No sign of wet stacking or water intrusion in the motor and...

I just picked mine up from Chambersburg Govplanet yesterday. On mine the gear mechanism was broken inside the tongue jack. The folks there aslo picked up the genset with a front in loader with forks on it and set it right on the pintle hitch for me. Make sure you bring an air compressor, one...

I may have found the problem with the motor. I had the valve covers off from last night and decided to check out the push rods. Cylinder 3 exhaust push rod is bent. The rest of the push rods look fine (I still have to really check them per the manual). The head is coming off since I now...

Thanks for all of the replies. Fairly certain the starter is working correctly. The flywheel seems to be turning quickly and the oil pressure gauge goes up to over 80psi but I will double check that when I get home. I am going to borrow a borascope and check out the cylinders. Since I...

Thanks jamawieb. I did take the refill cap off and put my hand over the hole while someone else cranked the motor. There was no noticeable back pressure. At first I thought the valves were sticking, which is why the valve covers came off. As far as I can tell the valves move freely and the...

Hi all, First post here. Just brought home my first 803a today and am having an engine problem. When I go to start the generator the motor will begin to start (you can hear the cylinders begin to light off) and then the motor seems loose all compression and start to freewheel. If you start...