Briggs Stratton Compression Release Mechanism

For Briggs amp; Stratton engines, the manufacturer simply recommends spinning the crankshaft by the flywheel in the opposite from the normal direction with the normal spark plug installed. A sharp rebound (as it compresses the trapped air since the compression release mechanism is not active in reverse) indicates good compression .

http://repairfaq.cis.upenn.edu/samnew/lmfaq/lmcomptst.htm

Briggs amp; Stratton 14.5 HP OHV No Compression [ 3 Answers ] My Riding mower has an 8 year old Briggs amp; Stratton 14.5 HP OHV Engine. Engine always maintained properly and has run well. While mowing, engine ran well for an hour and then suddenly quit for a split second, and backfired as it came back to life.

https://www.askmehelpdesk.com/tools-power-equipment/6-5hp-briggs-stratton-will-not-start-have-spark-gas-but-no-compression-386761.html

A centrifugally responsive compression release mechanism for an internal combustion engine has a C-shaped flyweight mounted to swing edgewise across one face of the camshaft gear. BRIGGS amp; STRATTON CORPORATION . Primary Class: 123/182.1. International Classes: The centrifugally responsive compression relief mechanism of this invention

https://www.freepatentsonline.com/3901199.html

An improved centrifugally responsive compression release mechanism transmits the valve loads from the valve operating means through the auxiliary cam member to a plurality of shoulders on the camshaft. The compression release member has a curved saddle to which is attached the auxiliary cam member as well as opposed, downwardly extending flyweights that ...

https://patents.google.com/patent/US5150674A/en

How the compression release mechanism works on Briggs . Constructed with a 50-millimeter stainless steel case, this superior watch also includes a round gold-tone-stainless-steel bezel with rows of glittering crystal accents, and a 22-millimeter two-tone link band with crystal accents and a push-button clasp.

https://mastermetalsmiths.com/repair/briggs-stratton-repair-manual-g1twzn8/

A centrifugally responsive compression release mechanism for an internal combustion engine. The release mechanism includes a yoke pivotally mounted to the camshaft and having an auxiliary cam member that is movable between an operative valve-unseating position and an inoperative position. A counterweight is associated with the legs of the yoke

https://www.freepatentsonline.com/4453507.html

It's part of Briggs amp; Stratton 's compression release mechanism - it pops the INLET (as opposed to the exhaust, as on smaller engines) valve open halfway up the compression stroke. This has a negligable effect at running speed, but at cranking speed it causes 'spit-back'.

https://howtomendit.com/answers.php?id=141590

Check the compression release by turning the flywheel the direction of rotation with the spark plug out, Watch the intake valve open and close. As the piston gets near the top of compression stroke, The intake valve which should be closed will open approximately 1/8quot; then close again when the piston gets to TDC.

https://www.lawnsite.com/threads/briggs-too-much-compression-to-start.374306/

After the engine hits about 600 RPM, the decompressor recedes and normal compression ensues. If the valve clearances are too great or the decompressor mechanism is broken, there will not be any mid stroke movement on the intake valve. In light of all this, the cheapest fix would be the flywheel key, therefore I would inspect that first.

https://www.smokstak.com/forum/threads/b-s-18-5-intek-engine-has-me-stumped.92804/

This releases pressure and reduces the force required to pull the starter rope or load on the starter motor. A compression release is used on most Briggs amp; Stratton engines and does not affect engine performance above engine starting rpm. In all my life I have never heard of relieving the compression so some wimp can start his mower.

https://www.lawnsite.com/threads/puzzler-w-b-s-intek-7hp-mower-engine.200383/

17.01.2011 #183; Eingebettetes Video #183; How to check the compression of a 4 stroke lawnmower engine like Briggs amp; Stratton , Tecumseh, Kohler... 23.03.2012 #183; Eingebettetes Video #183; Quick / Rough video on how the compression release mechanism works on Briggs and Stratton OHV Engines. i do plan to redo ...

http://compressiontestsupply.com/briggs-and-stratton-compression-test/

It's part of Briggs & Stratton 's compression release mechanism - it pops the INLET (as opposed to the exhaust, as on smaller engines) valve open halfway up the compression stroke. This has a negligable effect at running speed, but at cranking speed it causes 'spit-back'.

https://howtomendit.com/answers.php?id=141590