Briggs won't start without starting fluid


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Old 05-09-21, 09:02 PM
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Briggs won't start without starting fluid

Briggs 130202 on a Dynamark rototiller. Wouldn't start because of no spark. I removed and cleaned rusty flywheel with fine sandpaper. Also removed and cleaned coil the same way. Removed and cleaned very corroded points the same way. This was not a real good and proper cleaning of the points. The motor now starts by putting starting fluid in the cylinder and pulling 6 or 8 times. Will not start normally on just gas. I let it run for a half hour with Sea Foam in gas.
Is the lack of starting because of weak spark from improperly cleaned points, bad condenser or weak coil? I intend to use a file on the points tomorrow for a better cleaning. I have some extra Briggs motors around. Will parts from them fit or is part numbers critical? Will coils from other motors work if flywheel is same diameter?
 
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Old 05-09-21, 09:33 PM
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Sounds more like a fuel issue, when using the starter fluid does it run on it's own or are you constently shooting starter fluid into the carb?
 
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Old 05-09-21, 10:01 PM
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I started it with starting fluid and let it run for over a half hour with no problem except for a little roughness which I am guessing is from dirty carb and carbon buildup. Hopefully Sea Foam will work on that. I tried tilling a little and it worked without stalling or noticeable change in engine.
 

Last edited by sofasurfer; 05-10-21 at 12:45 AM.
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Old 05-10-21, 05:21 AM
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It could be a weak spark or it could be low compression.
 
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Old 05-10-21, 07:52 AM
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I think I have a compression gauge. What should the compression be?
 
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Old 05-10-21, 08:42 AM
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Compression is 60 psi. Starts at 45 or 50 on first pull and then 60 on 2nd pull.
 
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Old 05-10-21, 11:10 AM
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Is the choke closing?
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