Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Cursed lawn tractors


SmilinSam

Recommended Posts

Never seem to have a problem working on the bigger units, but everytime I touch the carb on a lawn tractor I meet with vexation. I'm 0 for 5 now, not a good showing. 4 were tecumsehs-to be somewhat expected. This last a briggs 8hp vertical shaft. Had it running to start, ran great as long as I poured gas into it. Rebuilt the carb and reinstalled. Now it pops and back fires through the carb. It will not even run if I put gas in the carb like I was doing before. What did I do wrong? I don't think these little ones like me................
Link to comment
Share on other sites

Hey!!! You know I was just thinking, I switched flywheels in order to use a charging coil. Do you suppose the magnet is in the wrong position on this flywheel for the engine its on?That would likely throw the timing off too would it not??????
Link to comment
Share on other sites

Sam, I had a similar experience recently. The darn thing sheared the key on the flywheel on the first pop and refused to run until the key was replaced. Ron
Link to comment
Share on other sites

Sam,Switching flywheels on a Briggs & Stratton engine-one with ring gear and magnets under flywheel.And one without ring gear and magnets under flywheel have the flywheel key in the same position.I have changed Briggs & Stratton engines from pull start to electric start with charging coil and had no problems.If the flywheel key keeps shearing you can add blue loctite to the area were the flywheel key and the flywheel sits on the crankshaft.This will stop it from shearing again.Karl[A href='http://www.geocities.com/simplicityva/index.html']http://www.geocities.com/simplicityva/index.html[/a]
Link to comment
Share on other sites

Actually I just found the problem, or should I say problems. The main culprit was of course the last thing I looked at..............the infamous spark plug. Put a new plug in and it finally ran, but was hard to start. Looked into the valves with the carb off and could see bubbles under the valve in the compression stroke as I turned it by hand. So, I lapped the valves. Now it starts and it runs. But it runs at about 3850 RPM at full throttle. How do you set the governor down???? Need to get below 3600rpm.
Link to comment
Share on other sites

Check this out.......[A href='http://www.simpletractors.com/operation/243431/page_5.htm']http://www.simpletractors.com/operation/243431/page_5.htm[/a]
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
×
×
  • Create New...