โAug-15-2019 12:59 PM
โAug-16-2019 03:24 PM
Chris Bryant wrote:
If it started suddenly, I would bet on a broken valve component- spring or rocker arm.
โAug-16-2019 10:51 AM
โAug-16-2019 10:23 AM
lakecityemt wrote:Chum lee wrote:
"I assume from the backfiring?"
I can't see it or hear it run online. That said:
Backfiring implies that unburned mixture IN THE INTAKE tract is being ignited and burned. (not the exhaust) Can you confirm that? Backfiring is a classic condition of a lean mixture which would point to a vacuum leak somewhere in the intake. Are all the breather hoses connected properly? Is the (new) carburetor properly seated on the manifold with all the gaskets? When hot, a lean mixture can lead to pre-ignition/detonation which may sound like a backfire.
What happens if you manually force the choke on with the engine warmed up, loaded, and backfiring? (richen the mixture) Any improvement?
Do you have a compression tester? If so, does the engine meet the compression specs?
Chum lee
Chum you might be a bit over my head, LOL... I will ask him to try and manually adjust the choke when its backfiring. No compression tester.
โAug-16-2019 06:20 AM
MEXICOWANDERER wrote:
It points to a fuel starvation issue. Classic symptoms.
โAug-15-2019 07:53 PM
grizzzman wrote:
When I had that happen to my onan,I found a broken valve spring. Worth a look. ( it had about 150 hours on it.
โAug-15-2019 07:51 PM
โAug-15-2019 06:56 PM
Chum lee wrote:
"I assume from the backfiring?"
I can't see it or hear it run online. That said:
Backfiring implies that unburned mixture IN THE INTAKE tract is being ignited and burned. (not the exhaust) Can you confirm that? Backfiring is a classic condition of a lean mixture which would point to a vacuum leak somewhere in the intake. Are all the breather hoses connected properly? Is the (new) carburetor properly seated on the manifold with all the gaskets? When hot, a lean mixture can lead to pre-ignition/detonation which may sound like a backfire.
What happens if you manually force the choke on with the engine warmed up, loaded, and backfiring? (richen the mixture) Any improvement?
Do you have a compression tester? If so, does the engine meet the compression specs?
Chum lee
โAug-15-2019 06:53 PM
โAug-15-2019 06:27 PM
lakecityemt wrote:
185 - My dad was not aware of their being a spark arrestor. In the visible portions none were found, its possible its in an area he could not see.
โAug-15-2019 06:19 PM
โAug-15-2019 06:15 PM
โAug-15-2019 06:10 PM
โAug-15-2019 06:00 PM
โAug-15-2019 05:53 PM
โAug-15-2019 05:33 PM