seattlepioneer
Active Member
- Joined
- Jun 20, 2020
- Threads
- 10
- Messages
- 93
I'm starting a new thread to report the problem I identified that was causing the B&S Quantum engine to not run.
I pursued a variety of bad fuel-dirty carb solutions, none of which helped a bit.
Someone suggested checking the spark and opening the head to verify that the valves were working. The spark and valves were OK, but getting into the head caused me to disassemble the engine enough to find the actual problem:
The carb in the quantum engine fits against an O ring on the engine. The O ring is on a plastic part that conducts the fuel mixture to the port for the valve for fuel.
I found that plastic part to be cracked all the way around it, which prevented fuel from being sucked from the carb into the engine.
Result ----engine would not run. Has anyone seen that happen as a broken part before?
When I identified that as the problem, I easily found a replacement part from a junk quantum engine, and the old carb and the engine would now run..
However, I created another problem I need help with.
After starting and running OK briefly, the engine slowed down and stopped. Investigation showed that the piston appears to be off center, causing friction and making the engine hard to turn by hand.
I did take the head off to check the valves, but I didn't do anything else that I know of that would have caused this problem,
Fix one problem -----create another.
Cab anyone tell me what I did and how to fix it?
I pursued a variety of bad fuel-dirty carb solutions, none of which helped a bit.
Someone suggested checking the spark and opening the head to verify that the valves were working. The spark and valves were OK, but getting into the head caused me to disassemble the engine enough to find the actual problem:
The carb in the quantum engine fits against an O ring on the engine. The O ring is on a plastic part that conducts the fuel mixture to the port for the valve for fuel.
I found that plastic part to be cracked all the way around it, which prevented fuel from being sucked from the carb into the engine.
Result ----engine would not run. Has anyone seen that happen as a broken part before?
When I identified that as the problem, I easily found a replacement part from a junk quantum engine, and the old carb and the engine would now run..
However, I created another problem I need help with.
After starting and running OK briefly, the engine slowed down and stopped. Investigation showed that the piston appears to be off center, causing friction and making the engine hard to turn by hand.
I did take the head off to check the valves, but I didn't do anything else that I know of that would have caused this problem,
Fix one problem -----create another.
Cab anyone tell me what I did and how to fix it?
