Briggs&straton 15.5hp
#1
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Briggs&straton 15.5hp
My b&s 15.5hp 283h07 0197e1,was running great ! No smoke pleanty of power and the half way threw yard I stopped to get a drink and it would not restart . Thought it might rocker arm so i checked and reajusted to right gap .005. Thought it might be spark plug or magneto? Replaced both still nothing ? It turns iver great (easy) then i checked compression (using my thumb over sparkplug hole) weak pressure . Then i just happened to remove oil dipstick and was getting pressure from dipstick tube!! (remember no smoke!) could i have blown rings? It won't start even with starting spray. The cars and boats (high performance even) i've had started with bad rings just would smoke alot. Any help would be nice !
Last edited by SNHARK; 05-24-18 at 11:22 AM.
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No problem. Just because both rocker arms are moving doesn't necessarily mean the valves are moving. I would definitely check that. I'm actually working on a 13hp briggs that was doing the same thing. I found that the exhaust valve is bent and needs replaced.
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Thank you tnoaker & bfhfixit . It was a exhuast valve seat. Valve was staill good and i used a big c/clap and pressed it back in finish mowing yard and so far so good ! I could not find a part# for the valve seat in case i need to replace it. Any idea?
#9
You won't be able to find the seat available on a parts breakdown or from Briggs. It comes with the head. When you put it in, you should have peened it in to keep it from coming back out again. There are lots of videos about peening in valve seats, so when it comes loose again you'll know what to do. Generally the seat comes loose as a result of overheating, so make sure you are running the engine at full throttle while cutting and the cooling fins are clean and the fan on the flywheel is in good shape and all your tins are in place around the cylinder.