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NO COMPRESSION MY ROVER MOWER WITH BRIGGS & STRATTON CLASSIC 37 ENGINE HAS LOST COMPRESSION WHILE MOWING, HOW BLOWS BACK THROUGH THE CARBY & HAS ONLY GOT 10PSI COMPRESSION ,I HAVE REPLACED THE HEAD GASKET & IT HAS 7TH CLEARANCE ON BOTH VALVES

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  • gregcarpente Feb 22, 2009

    the mower was working fine ,but all of a sudden it stopped

    it had plenty of oil & airfilter was clean , is there a decompression lever internal that could have broke ?it just spits back through the carby when i try to start it

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4 Suggested Answers

  • 62 Answers

SOURCE: What oil to petrol ratio does this engine run on?

http://www.briggsandstratton.com/maint_repair/manual_and_more/

Go here and enter the proper information, and see if they have the manual available.

Posted on Apr 18, 2009

#1 Taper
  • 1040 Answers

SOURCE: i have a briggs and stratton classic 3.5 mower,

You need to replace the diaphragm in the carburetor.

Jim

Posted on Jun 13, 2009

  • 124 Answers

SOURCE: briggs and stratton quatum 5 hp lawn mower engine

More than likely you have a valve that is not seating properly or you have a sheared flywheel key that is throwing the ignition timing off.

Posted on Sep 20, 2009

Testimonial: "very helpful! thanks"

riceski
  • 1851 Answers

SOURCE: what fuel do i put in a briggs stratton classic 35

reg fuel - not high test or super fuel - just plain ole 87 octane.

Posted on Jun 27, 2010

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