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Garden Tractors / Mowers / Scooters Vintage lawn and garden tractors, mowers, snow blowers, snowmobiles and other old machinery that is driven by small air cooled engines.

Garden Tractors / Mowers / Scooters

Briggs & Stratton 10 HP... backfires, then breaks / bends valves & push rods


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  #11  
Old 12-17-2018, 08:27:21 PM
radiodoc radiodoc is offline
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Default Re: Briggs & Stratton 10 HP... backfires, then breaks / bends valves & push rods

Here is a link to the B&S parts breakdown for the 20G414-0111-E1 engine. https://www.briggsandstratton.com/na...20G414-0111-E1
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Old 12-18-2018, 09:20:46 PM
R Davis R Davis is offline
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Default Re: Briggs & Stratton 10 HP... backfires, then breaks / bends valves & push rods

After taking a closer look at the valve guides, I made a mistake thinking the exhaust guide was where it belonged, it's actually been pushed up at least 3/8 of an inch.

After explaining that and the expense of a new head, plus the possibility of problems with the plastic camshaft and lobes, the owner decided to cut his losses and start fresh with a new snow blower.

As usual, the info shared by members here was a big help. Thanks again to all!
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Old 12-19-2018, 07:34:00 PM
Andrew Mackey Andrew Mackey is offline
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Default Re: Briggs & Stratton 10 HP... backfires, then breaks / bends valves & push rods

Replacement cam is relatively cheap . A head is not so much - expansive item. Not so good a design by B&S, if the engine runs hot or the wrong oil is used, the head warps and the guides work loose. You can try staking the aluminum by the guide, to try and keep it in place, but that is a 50-50 proposition if the guide stays in place. Common problem with them
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