smallenginerepairs
Member
- Joined
- Jul 4, 2021
- Threads
- 5
- Messages
- 38
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Onan 24hp twin engine, spitting gas out of top of carb when trying to start. Has a new carb. Will not start. What can cause this?
- Thread starter smallenginerepairs
- Start date
More options
Export threadbertsmobile1
Lawn Royalty
- Joined
- Nov 29, 2014
- Threads
- 64
- Messages
- 24,729
In order for the guys to offer advise you need to post a little background information such as
how was it running prior to this , what did the exhaust look like ? Was there any odd noises while it ran,
was it getting hard to start over time ? How was the power , was it missing etc.
how was it running prior to this , what did the exhaust look like ? Was there any odd noises while it ran,
was it getting hard to start over time ? How was the power , was it missing etc.
smallenginerepairs
Member
- Joined
- Jul 4, 2021
- Threads
- 5
- Messages
- 38
The owner of the machine was having problems starting it, so he put a new coil, carb, plugs, and new head gasket on one cylinder, then he said it ran fine. The last two times he used it ,it was getting hard to start, then he brought it to me. i thought the float in the carb was stuck and know that aftermarket carbs can be at times unreliable ,so i put a carb from a manufacturer i use a lot and have had good results with, but i know now its not the carb.
What is the Model, type and code of the engine?
The reason I ask for engine info is some spitting of gas back into the throat of a fast cranking small 4 cycle engine that won't start is normal thing on some engines and very misleading and cause one to get on the wrong page when trouble shooting the engine.
When seen the spit back is usually due to the compression release being on the intake valve/valves and when the carb throat/manifold is loaded up with gas it will spit some back gas the engine cranks fast.
The reason I ask for engine info is some spitting of gas back into the throat of a fast cranking small 4 cycle engine that won't start is normal thing on some engines and very misleading and cause one to get on the wrong page when trouble shooting the engine.
When seen the spit back is usually due to the compression release being on the intake valve/valves and when the carb throat/manifold is loaded up with gas it will spit some back gas the engine cranks fast.
Last edited:
Was it spitting or back firing out of the carb.?
Have a Briggs Vtwin 23 hp. that sheered a flywheel key. Replaced key, would not start, took brand new carb. off twice, reset armature clearance, reset valve lash. Would not start, kept back firing out of carb. Then it struck me, the beast is out of time.
Might want to check.
Have a Briggs Vtwin 23 hp. that sheered a flywheel key. Replaced key, would not start, took brand new carb. off twice, reset armature clearance, reset valve lash. Would not start, kept back firing out of carb. Then it struck me, the beast is out of time.
Might want to check.