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#2061655 - 10/29/10 12:22 PM 18 hp briggs and stratton compression release?
yeehaw1960 Offline

Registered: 05/02/07
Posts: 580
Loc: Nebraska
Is there a (auto) compression release on an 18 HP Briggs (single cylinder) to aid in starting? Sometimes I have to manually turn the engine past the compression stroke to get it to turn over. Battery is good because I have the same problem when it's hooked up to my truck battery.

#2062571 - 10/30/10 02:10 PM Re: 18 hp briggs and stratton compression release? [Re: yeehaw1960]
JTK Offline

Registered: 08/14/03
Posts: 8165
Loc: Buffalo, NY
A large Briggs OHV should have an internal fly-weight setup that holds the exhaust valve open a bit until RPMs increase. Maybe check the valve lash. That being out of spec will effect this system.

2016 Subaru Forester 2.5, CVT. 2013 Dodge Grand Caravan SE (Babe magnet III)

#2090510 - 11/29/10 05:06 PM Re: 18 hp briggs and stratton compression release? [Re: JTK]
100td Offline

Registered: 11/28/10
Posts: 8
Loc: Australia
Actually I think is holds the inlet valve open on this particular eengine, when starting make sure the throttle is open, also the valve clearance needs to be set correctly for the release to work correctly.
Here is one reference to it, but there are many others with details of how to do it correctly, and many references of people replacing battery and starters to find the same thing and then adjust the valves and all is good.

Edited by 100td (11/29/10 05:07 PM)

#2091236 - 11/30/10 02:21 PM Re: 18 hp briggs and stratton compression release? [Re: yeehaw1960]
browning300wsm Offline

Registered: 05/10/07
Posts: 253
Loc: quebec....canada
valve clearance needs to be set correctly for the release to work correctly ..had the same problem and it is an easy fix
i question my SANITY for purchasing a 3.5 ..5 cyl.

repaired my sanity sold the 3.5 colorado a jeep liberty 3.7