Toro 303447 - Compression Issues and Causes

Compressionreleasesystemsareusedtodecreaseeff ortrequiredtostartengine.
Holdstheexhaustorintakevalveslightlyopenduringstarting,andthenallowsittofullycloseonce
enginestarts.
Maybedesignedintocamshaftandholdthevalveopenforashortperiodoftimeoneverycompression
stoke.
Maybemechanical.Engagesduringstartinganddisengagesaftertheenginereachesoperatingspeed.
Compressionreleasewillaffecttheresultsfromacompressiontest
There are some problems related to compression in
gas engines.
Two possible problems:
Inadequate compression
Excessive compression
Inadequate compression
Commonly caused by leaks
Excessive compression
Carbon Buildup
Harder starting (Slower crank speed or hard rope
pull)
Engine performance problems
Detonation
Pre-ignition