Craftsman Model 917371030

[schmud64]

I have a Craftsman lawnmower model 917371030 with. Briggs engine model 11P905-1267-B1. I have a had a hard time starting. I could spray a little carb cleaner and it would start, still hard but start. I rebuilt the carburetor put in a new spark plug gapped the magneto/coil tested the spark by placing a spark tester in series with the plug and high tension plug cable and when I start the engine I get solid light flash in the tester. But the engine doesn't turn over. I have good compression. I can feel good vacuum at the carburetor and smell gas getting to the carburetor and there is gas in the float bowl. I can shoot some carburetor cleaner into the carburetor and it still won't turn over. I can't help but think the coil even though it looks as though it is providing spark is not hot enough to fire the engine. Any help would be appreciated

 

[ILENGINE]

May need to check the flywheel key for offset or shearing.

 

[schmud64]

May need to check the flywheel key for offset or shearing.

Thanks. I hope that's it. Been driving me crazy

 

[schmud64]

Thanks. I hope that's it. Been driving me crazy

Thank you ILENGINE, I got home tonight, popped the fly wheel off and sure enough the key was sheared. I can't wait to get home tomorrow with a replacement key and try it out.

 

[schmud64]

Hi I replaced the key. Still won't start. Tries to. I can smell gas getting into the chamber. Back fires lightly, not a full back fire, like all the fuel is not getting detonated. I can also shoot some carb cleaner in and that doesn't help start it. I have to think it's the coil. I place a spark test on the high voltage plug wire (not a B&S tester) an old car engine tester and it lights. I also checked the resistance on the coil and it's 7700 ohms. I wrote B&S and they told me to replace the coil. I found a coil on E Bay for $20 I think this may be worth the gamble before I break down and buy a new mower Any help much appreciated.
Thanks