Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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Just repaired my starter on a 20hp briggs and strat/reassembled all parts .at first the engine ran smoothly,after 2.5 minutes i shut it off .I restarted engine when it suddenly started to make a clanking noise! I thought something was hitting the flywheel ,after checking it It still made a very loud noise ?? I got a stethascope and pin pointed the noise to the right cylinder.sounds like a blown rod or a piston /No smoke ,has clean oil. no off balanced idle of engine.Help!!

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I can't be for sure but based on past experience with similar situation, it sounds like a loose rod. When mine did the exact same thing I took apart the engine and the two bolts holding the piston rod onto the crank shaft were significantly loose. Tightened them down (thank god i didn't damage the crank shaft) and it was fine. Good luck, let me know what you do.

Posted on Sep 28, 2009

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