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Discussion Starter #1 (Edited)
I'm helping out a friend with his daughters Sportsman 90. It ran fine until it ran low on oil. He added some Yahma Lube and it ran for about 5 minutes and then stalled out. He couldn't get it restarted. I drained the oil and replaced it with the correct oil. I checked for spark and it has a good spark. I replaced the spark plug, drained and changed the fuel, drained the carb and replaced the fuel filter, and cleaned the air filter. Still won't start. It cranks over but back fires and sputters. I'm thinking it may be a compression problem. I don't have a gauge but the compression doesn't feel too great on my finger. Any thoughts or suggestions. Thanks. Ken
 

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Welcome to the board!:xmas:
 
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