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In Reply to: Re: SEARS 16.5 KOHLER,Backfire on start posted by john on Tuesday, March 18, 2003:
John,
You are reading it right... The ACR is NOT your problem. You did say you replaced the SAM, but did you replace the ignition module? This could also be causing the backfire. Is the gap set at about 10 thousandth at both gaps? I usually use a buisness card in the slot and tighen down both screws. You MUST also be sure the the magnet on the flywheel does NOT touch the core of the ignition module at all.
Also try removing the air filter, and poring just a LITTLE gas into the carb input, to see if it will start with the exta fuel. I like it best to remove the air filter house, and use several large nuts for spacers and bolt the carb on with out the housing. This way you can see the carb, and where the choke and throttle are at, and make any adjustments with the idle mixture and idle speed.
Also the SAM REQUIRES at least 7.2 volts to work correctly. If your little battery is even a little weak it may not be putting out the 7.2 volts while CRANKING. Try using a good large automotive type battery to crank it with, this way you will be sure to get the 7.2 volts to the SAM module.
If you need anymore ideas, just yell!!