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Decompression Valve Mod for Shindaiwa EB8520

bob

LawnSite Platinum Member
Location
DE
Why? Is it hard to start?
 
OP
S

Snow to Go

LawnSite Member
It's just that the thing has a lot of compression & is a little feisty on the pull back, especially when its on a tailgate or a elevated step or ??
A decompression would be great !!! on my husky 346xp it does wonders when your out of position.
Any ideas I haven't got into it yet but I hope I can find a spot in the Head to put one.

Thanks -Len
 

jkilov

LawnSite Bronze Member
Location
MS
It won't be easy or worth it. Being a 4-stroke there's little space in the head for tapping holes. Most 4-strokes have a decompression feature built into the cam : a weight bumps the intake valve then centrifugally retracts as the engine starts. Not sure if the 8520 is equipped with this system.

I would try to fit a start spring of some sort or even simpler an elastostart handle from stihl or a spring starter handle from shindy's 446s chainsaw.
 
OP
S

Snow to Go

LawnSite Member
Thanks for the input. I thought about a spring set up for the starting I remember having one on a old lawn mower (spring crank w a button to release) when I was a kid (back in the sixty's) & it seemed to work good. I didn't know the shindy chainsaws had them I'll have to check it out. I know there wont be much room in the head but I thought I could squeeze one in !!!
I'll investigate further & let you know .

Thanks -Len
 

FIXDISS

LawnSite Senior Member
Location
Roanoke.Al
Has it always been hard to start and had a lot of kickback ? Just thinking it might need a valve adjustment.Was searching on-line and only found a couple that required drilling and tapping a 10mm hole .
 

Tharrell

LawnSite Silver Member
Have you tried pulling until just after tdc, and then giving it a good pull? It might be a little easier on the down stroke.
 
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