If it pulled the starter rope out of your hand you might have a sheared flywheel key. It also won't run right.So weird thing... went to start it today and it yanked the cord back. Checked the valves and the intake was off at .009... it was set at .003-.004. Now this could be coincidental since I just adjusted them and maybe it went out some. Adjusted it but it seems the compression release(when the intake valve bumps off during the compression stroke) bumped off fairly early in the compression stroke. Maybe it's just me? Could it be a timing issue?
Anyways got it started and sprayed carb cleaner from the head where the intake tube is to the carb. Sometimes it seems like it helped a little others not. Kinda confusing. So I can't say I definitely have an intake leak.
I did replace the fuel filter with a disc style and I noticed when it ran on the high side it ran a little better, but didn't solve the problem (maybe making up for a lean issue but still surging/waffling)
I also tried above with over riding the governor with no success.
So as if now I'm calling it a carb or timing issue.
So ill start with the carb and get an Amazon job to see if there is a difference. That brings me back to the walbro/nikki question.
And thanks so much fellas for the help so far. Really appreciated
No, thought I had everything squared away, that was due to recoil backlash and the flywheel key is 100 percent. I have an Amazon carb coming friday.. so if its not that I'm suspecting timing somehow... maybe a tooth is broke off on the gear or something. Not even going to think about it until I get this carb on.Surging can also be caused by a partially sheared flywheel key. Had you hit anything mowing before? This is the same as the post earlier that mentioned timing. If the key is worn or partially sheared it will throw the timing off and surge. Been there done that.
I have a 5 gallon gas can I use for my small engines and it gets seafoam dumped in it. Im a firm believer in that stuff. My boat has an 84 evinrude, old man I got it from that bought it new said he's put seafoam in every tank of gas its ever seen and the carbs have never been off. I do the same thing and it runs like a brand new engine. Never tried b12 though, ill look into it!Good luck! Be sure and add a few ounces of Berryman B-12 to the gas tank every so often to minimize dirty carbs. I do that with all my outdoor equipment small engines and I rarely have fuel related issues.
I have some .014 stainless stylets that i use to run through every orifice of a carb. Will not go around corners, but cleans jets and tubes. That with carb cleaner , gets most carbs running decentEven though you can see through the jets just fine, There is a residue from old fuel that makes them smaller. Get yourself a tool that welders use for gas welding. It has many size fine wires that you can push through the jet. You will be surprised at what you see.
I put small engine carbs in a peanut butter jar and fill it up with Berryman's carb cleaner and put the lid on. Then I put the jar in the ultrasonic cleaner full of hot water. Best of both worlds. You can see the crud just come flying out.I am not a firm believer in ultrasonic cleaning carbs. Use a strong solution and let the thing do its magic. I had hand cleaned carbs before with little or no luck but 30 minutes in the cleaner and they come out factory fresh and working like a top.
Berryman B-12 is much more potent than Seafoam. I've compared the Technical Data Sheets for both, and Berryman B-12 contains much stronger varnish and dirt "cutters" than Seafoam.I have a 5 gallon gas can I use for my small engines and it gets seafoam dumped in it. Im a firm believer in that stuff. My boat has an 84 evinrude, old man I got it from that bought it new said he's put seafoam in every tank of gas its ever seen and the carbs have never been off. I do the same thing and it runs like a brand new engine. Never tried b12 though, ill look into it!