ThermoKing Alarm 63.

I think I got it fixed. It was the fuel line from the fuel tank.The fuel line was too long and it was touching the bottom of the tank,and it could not get enough fuel.

 

Having similar problem , I was this issue is related to egr - California complaint motor vs high altitude . Can you please update us on this thread . Thx

 

SB210-I'm having same problem code 63 with null start code,also. I will change fuel filter since it's been a year now.

 

update,I put new belts,did tune up on it & primed it and now working fine.

 

One of the guys mentioned bad ground on Code 63 (the unit stopping randomly) -that’s exactly what the problem was with my unit SB210 - it directed me to the problem solving
Idea. It has been stopping for the past two months -I replaced the fuel lines both lines the main and the return line it did not help -cleaned the little filter by the hand priming pump (it was not too dirty, everything I did, did not help. Finally looked at the ground connections and found a few lose ones. That solved the problem.
Thank you for your post. It directed me to the real problem. Sweet!

 

I just went through this with mine. Was working fine then started shutting off right after it started -prime it and it would run but only on continuous any time it was on start stop she would code out with63. Got back to the yard and pulled the filter out of line and found that it was clogged up-cleaned it and she runs like a million bucks again. A couple months ago I changed the tank so I figure its residual gunk from the swap.