7.5 B&S Intek not starting..

Old 03-05-12, 01:38 PM
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7.5 B&S Intek not starting..

I have a 7.5 Briggs Intek engine that I used to upgrade my Ariens snowblower. Using it one day, it suddenly shut down and wouldn't restart. After checking the basics..ie spark and fuel, I checked compression, which was zero. I also noted that I was getting a good puff of air out the carb on each stroke. Next, I checked the valve timing. It seemed that they were opening when they should (intake opens at bdc and exh opens a tdc at the proper stroke). Then I pulled the head and took the valves out. I noticed that the valve guides are sitting at different positions for the intake and exhaust. Is this correct? Could it be the reason for my no start? The cylinder wall looks good, no scoring. Although there is some staining. The valves don't look bent although manually moving the valves, the intake sticks. Any other ideas? Thanks!

Old 03-05-12, 11:38 PM
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Yes, you dropped a valve guide and it is holding the valve open. This is generally caused by heat. I'd look for a good used head on ebay or something like that, but you might have success pressing the guide back in and peening around it a bit to help hold it.

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