Compression release?

IaLeo

Well-known Member
Years back I gave away a Mac 1000 because the sucker was hard to pull with two fingers and most of the time backfired jerking the T-handle through my fingers.

Two years ago, I bought a used Stihl 310 and have not used it much, if at all. It had a longer bar than my 16" Poulan which I use most of the time. But now the Stihl acts like the cylinder is full of stuff as the pull only gets one revolution. I can't seem to be able to pull hard or fast enough. I do not see any compression release.

Is there some instruction I am missing? I did get it started once recently by clamping the saw down on a heavy, knee high sawhorse and using two hands, the saw "let loose", spun and started. ??????

Leo
 
The MS 310 does not have a compression release. You usually find the compression release in Stihls pro line of saws. I have a MS 461 that has the compression release and it starts a lot easier than my MS 250 or MS 310. I have a 2x4 that I stick through handle and put my boot on it to hold it down when starting them (MS250-MS310).I have had the MS 250 back to dealer and was told it had more compression now than it did when it left factory.
 
My chainsaw is also a Stihl MS 310. I will get the "very hard to
pull" symptoms if I follow the Stihl starting instructions. What
happens is that it gets flooded real easy in the "start/choke
position. If you pull the sparkpug when this is happening it
immediately pulls easy (ie hard- pulling is not a mechanical thing).
What I do is modify the starting procedure. Put in start/choke
position and pull until it pulls hard then flip down to "run with full
throttle" position and pull, and if it doesn't start release the
throttle and pull a couple times. When de-flooded I'll flip back to
the start with choke position for a pull or two to feed some gas and
repeat the sequence until it starts. It's kind of an aerobic
excercise but it works.
 
I'm thin and don't have a lot of upper body strength, so I know what you mean. When I start mine, I push the saw down and away from me with my left hand while pulling up on the starter rope with my right. That greatly increases the effective pull on the rope.
 
I wish my 066 had a compression release. As the number of birthday candles on my birthday cake grows it get harder to get that thing started but once it does it is the best saw I have ever used.
 
The trick of using a 2 x 4 through the handle was a good trick, I tried it and used my stronger arm/hand and it started. Thanks for the obvious, simple idea! Leo
 
my 064 acts just like your 066. My 088 has compression release & starts easier than my 029.
 
others are right, its a flooding issue. Take the spark plug out & crank several times to clear out the cylinder. If it still does it, fix the carb.
 
Just my opinion but I have a Mac-1000 and it always starts with not too much effort. Made by Pioneer and then Partner as a P-100 and that is the cc volume. Would guess you most likely had a problem with it. That is a Very expensive saw to have given away. Look on fleabay. MacCulloch made it a 1000 so it would fit into their numbering system. I run a 4 1/2 foot bar on mine with 404 chain. Beast with 6hp!
 
Sounds like you are doing what we call drop starting your saw. Just be careful that don't cut your legs doing that. I wear chainsaw chaps when cutting wood.
 
I bought a new Stihl MS 181 last week, no compression release but it has a different type of starter. Pulling on the cable, that winds up a recoil spring that turns the crankshaft. The effort to pull it is about 1/2 of what it would take with out the recoil start.
No idea as to how long it will last or how trouble free it will be. Sure is nice for now. It looks like I mite have the other two Stihl s for sale , as I have "to many candles" on the b day cake " now too. clint
 
Let us know how that starting system works out. Many years ago we had a lawn mower that you wound up and pushed down on crank after It was wound. It was good for a few years and then spring got weak and wouldn't spin it. But that was years ago and better spring now then back then.
 

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