6.5hp Briggs wont start properly

davbell22602

davbell22602

Lawn Addict
Briggs 120602-0131-E1 6.5hp ohv

Let someone borrow this last year. Got it back with a bent blade. Nothing but trouble out of it ever since. Will start in 6 pulls with no blade but I hear noise like its sucking air when I'm pulling the cord. I can get to start with a new blade within 10 pulls with sucking air when pulling the cord but wont restart when hot unless I let cool down for 20 minutes to 30 minutes. I replaced spark plug, flywheel key and mower blade. I have extra engine just like it that got in a trade but dont the history on it through.

bent pushrod? stuck/bent valve? blown headgasket? Whatelse do I need to check or say heck this engine and swap the other onto it and get it running.
 
Try replacing the primer ball gasket that is located in between the air cleaner box and
The carb and clean the carb. Another thing to try is checking the coil gap. I had a 6.5hp come into my shop that wouldnt even start and thats what fixed it. When the blade got bent it could have knocked the coil loose. But i would start with the gasket and cleaning the carb out. That gasket is a common problem for this motor... Poor design
 
Xbbork said:
Try replacing the primer ball gasket that is located in between the air cleaner box and
The carb and clean the carb. Another thing to try is checking the coil gap. I had a 6.5hp come into my shop that wouldnt even start and thats what fixed it. When the blade got bent it could have knocked the coil loose. But i would start with the gasket and cleaning the carb out. That gasket is a common problem for this motor... Poor design
Click to expand...

Already checked carb and cleaned it. Replaced the air filter base gasket. Have .010 on the air gap.
 
Have you removed the plastic cover on the top of the motor and cleaned that out? If not it may have grass caked in there and not letting the proper air flow in to the head causing it to over heat
 
What did you set your spark plug gap to?
On the OHV model 11 & 12 it should be set at .020".
This can sometimes cure hot start problems. Other thing is make sure the spacer between the carb and engine has not been distorted. File down with emery paper.
Other thing which iv had is if the crank has taken a knock, the flywheel magnets for the coil can lose there magnatism which can make loss of spark.
 
pugaltitude said:
What did you set your spark plug gap to?
On the OHV model 11 & 12 it should be set at .020".
This can sometimes cure hot start problems. Other thing is make sure the spacer between the carb and engine has not been distorted. File down with emery paper.
Other thing which iv had is if the crank has taken a knock, the flywheel magnets for the coil can lose there magnatism which can make loss of spark.
Click to expand...

I just put in on whatever the pregap is on the torch spark plug.
 
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