Chocktaw H140 Heater - New start up

[Joe Drifter]

Hey group,

I recently got an H140 heater. When I start it up after the initial ignition it starts actling like it gets too much fuel. It will smoke like crazy. The fuel gauge will go from about 28psi and then peg the needle. It will smoke like crazy and start kinda popping like a jet engine is firing up and smoke even more. Fuel will even drip out of the exhaust elbow and occasional flame will exit the exhaust pipe. Any idea what's going on?

 

[Guyfang]

Have you ever seen this heater work right? Or is it new to you? Have you downloaded the TM's.

 

[Joe Drifter]

It is new to me. I have the new manual. I have looked through it but I don't see anything specific to this symptom. I'm pretty deep into the manual now. I just see how to replace things and troubleshooting. It just has one little bit on Troubleshooting excessive smoke and based on the flow it says return to service. I just don't know what normal startup looks and sounds like. It is basically new with 3 hours on the hobbs.

 

[Backwoods deuce]

Search H140 heater threads with the user M1161 and this should get you started in the right direction.

 

[dwade154]

Joe-

I have had several units do what you are describing. I posted this on another thread.

"Remove the sight glass (27mm) and take a flashlight and look at the fuel injection nozzle through the inspection port in vent mode. If it's not leaking fuel in vent mode and cool down you're good. If you see the injection nozzle leaking fuel in the combustion chamber you need to add a 120v 20$ fuel solenoid on the fuel line from the pump to the combustion chamber and wire it in series with L1."

This is most likely your problem. I would bet on it. The pumps (suntecs or websters) push fuel past L1 and leak fuel into the combustion chamber in all settings. It leaks out the exhaust when this happens just as you described. Its an easy fix.

Check out my previous thread which has all the info for what you need to do.

"Choctaw H140 sending too much fuel to burner"

Make sure to clean out the raw fuel from the combustion chamber as best you can before you start the unit back up. You will need to remove the burner assembly to do that. Might as well adjust the burner assembly while its out too--follow the TM for that.


Hope this helps.

-D