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Did you use a sealer on the housing? I use Indian Head gasket shellac. My O'Reilly's only had one thermostat in stock but several of the gaskets. I had him order me three more stats and took home four gaskets with the one stat he had. Cheap enough parts to keep some on hand.

Excellent!!! A non exposed stainless steel spring will be a great improvement over conventional construction and the silicone stuff is top shelf. Please keep us updated on the production progress. I'll feel more comfortable with a couple of sets of hoses on the parts shelf, and thanks for the...

Yes, using the green Prestone. Never had a hose spring dissolve with it in 44 years in either my own vehicles or any vehicle I've worked on in the repair business. The wear on the springs could also be partly due to "scrubbing" action by the fast and continuous flow through the hoses since...

Update: Finally got some decent weather to work on the 803a. I drained the coolant down a bit and removed the thermostat housing, surprise!!! there was no thermostat in there, this accounts for the hoses being equally warm(not hot) as the coolant was free flowing in the system and the generator...

Will do. Probably be a couple of days due to rain and parts acquisition.

I'm convinced its the thermostat and will not run it until its changed.[thumbzup]

I think you got it backwards. The thermostat is to keep the coolant in the engine to come up to temperature. That's why you see diesel trucks with zippered covers over their radiators to reduce air flow and keep the engine warmer as they drive. A diesel with an open flowing cooling system will...

Outside temp was in the 50's. Both hoses felt about equally hot(warm really) so I think the coolant was just free flowing causing the set to run at a minimal temperature. That would indicate an open thermostat. Its pouring down rain here all day so it'll have to wait for another day.

Thanks, that saved me from digging up that thread with the info.[thumbzup]

The hose springs in both my hoses were very much dissolved. I replaced the lower hose with a new one and removed the remnants of the spring from the upper hose and cleaned and rinsed it out as best I could then reassembled. I guess I'll have to pull the thermostat housing and see if the...

Yes, no load applied. I would think that it should be running at least around 160 F even with no load. Somethings a miss.

Thanks for the reminder, I forgot about that!. I have a laser type temp gun and didn't even think of it. I use it to monitor the stack temp on my wood stove periodically. Will get it out tomorrow and see what the input of the radiator temp is after an hour running time. I'm also almost finished...

Yes pretty sure the gauge is working ok. The hoses are not too hot to hold onto so its running pretty cool. Much cooler than it should be. I don't have any other means to check the coolant temp other than my hands which should not be able to hold onto a properly up to temp engine.

Seems it doesn't want to come up to anything higher than 130 degrees. Exhaust gasses are hot, can't hold a hand above it 6 inches for more than a second or two. I drained the coolant, removed both radiator hoses and cleaned all the connections of corrosion and replaced the lower hose. I used a...