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I still say take the control coupla off , tear down backplane, inspect, deoxit and reinstall components.

Tm does say under conditions, solenoid valves removed which includes the lines

Are you still using the midevil filter setup? I understand its just for major debris, but wow. i might try a real filter setup unless you have time and warm weather to tear the heater all down. i dont think you have to remove all of the components, i think i would try just pulling the fuel...

Not a bad idea, but every one that i have worked on the fuel gauge was not correct. i would pull the pickup tube first, or blow air backwards, if you aren’t moving it around all the junk should say settled in the bottom.

Here is the tm for the governor https://www.steelsoldiers.com/threads/mep-805b-806b-electric-fuel-cutoff-tm-troubleshooting-install-manual.145444/ did you adjust the mpu when reinstalling? Or just 1.5 turns out and stop? There is a procedure in the tm for mpu adjust have your searched and...

Loose connectors on the back of the control module, i had a problem child that didnt want to work right, so i removed control box from genny, sat down in the shop, removed all components from back plane, inspected connectors, cleaned with air, reinstalled and it fixed all the problems, not...

Yes, turn down fuel psi, its just wasting fuel, sending out the exhaust, you fuel economy will go up and you won’t notice any difference. i am at 3100’ and run about 90 psi did you read his thread? https://www.steelsoldiers.com/threads/its-cold-outside-lets-talk-heaters-h81-h82-h83-etc.132138/

Over pressure, try running 80-90 psi also pull front cover, make sure the flame sensor sees the burn chamber

sounds like a start relay, or s1 took a dump

What ☝🏼said, mpu. i have always said, if it wont start check mpu, if it runs out of fuel, check mpu, if there is a rod thru block, check mpu, get it? Mpu is the only connection between engine and and computers also does it look like some one dinked with the injection pump and governor assy...

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So i have more time to explain, if you have ducting on the heated exhaust air that has some bends, or restricted, you want to run that temp like 10*F warmer tokeep the burner from kicking on and off. if you dont have ducting, set exhaust temp at what you want the exhaust air temp, and the...

Those are intake (cold air) and exhaust (heated air)temp adjustment, set them at the temp you want the burner to kick off, same like your house thermostat

which knobs are you referring to? photo?

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I have 1 spare top hood panel i will share when needed

Will it run on fan only

*Crickets*

I had the plastic connector fail that connects he actuator to the harness, so i just cut it out and replaced with covered male/female connectors

I load tested my 805b, the only droop in hertz i can get is going from no load-0kw to full load-33kw, its only 2 hertz for only long enough for the display to change, i cant seem to find the load testing videos of an 805b