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Got my second project 200T fired up

Al Smith

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The 200s are an interesting design,made to be a race horse little sprinter .They have inherent problems but once you get to know these it's not a big deal to address them before it becomes a major undertaking .Damned shame they stopped making them .
 

MattG

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What on a hot restart .Usually a drop with throttle .
Yeah cool. I started off on this line of enquiry several posts back :) basically the 200T of mine with the squish set, restarts hot with zero throttle 100% of the time, whereas my first one (not got squish set) doesn't. I'm not too fussed, but just wondered what others had experienced, i.e. to build up more reasoning for why setting squish per spec. is generally, a good thing.
 

bikemike

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Just out of interest - is that with zero throttle squeeze, or with a slight squeeze like Wolf and Mike were saying.

(And no jokes about giving things a squeeze from the rest of you, please. :))
Any bit of a squeeze dumps a Lil fuel and extra clean air to fire from.
 

bikemike

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Yeah cool. I started off on this line of enquiry several posts back :) basically the 200T of mine with the squish set, restarts hot with zero throttle 100% of the time, whereas my first one (not got squish set) doesn't. I'm not too fussed, but just wondered what others had experienced, i.e. to build up more reasoning for why setting squish per spec. is generally, a good thing.
More compression more power n tourqe = 200t reputation for being a bad azz saw.
Those saws have the equivalent to the ms 260 for internal breathing room for a much smaller displacement. One thing I have noticed with the 020t 200t is the crank seals and needle crank bearings are the biggest issue and the accelerator pump carbs to why they can be fussy or or problematic. I think find a retro fit ball bearing could help preserve the saws for our future generations being the crank won't be the bearing race and letting a standard style bearing take the brunt of the wear n tear on the races
 

Wonkydonkey

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I know what you mean....so many other things to do.


No sweat. When you feel inclined to do it give me a shout and we can go through it all. :)

Cheers.
It will be done, but I think it 'm gonna be playing with the squish on my Ms 260 first, as I have a spare P&C I may just do a bit of timing at the same time, just to get the hang of it.
 

Al Smith

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It only dumps fuel if it has the model with the accelerator pump ,one of the last models of the Zama C1Q carb .The problem with a ball bearing would be finding one that small .Even so it would be an ordeal to machine out a bearing pocket if it were to fit .To add to that even if it could be done you'd need to make a spacer to go on the inner race to hold the bearing against the crank and case .Just sayin .
 

Al Smith

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Now then,most of my little saws have the low speed set a tad rich and most of them will load up on a long idle.I'm okay with that .Fact I have an 024 Stihl that is a dandy that will sputter out but again with that small of a saw it's a drop and throttle,one pull .Unlike some I don't let a saw sit on the ground and idle,either running or off .Before anybody asks,no I don't drop start a large saw ,good way to cut a leg off IMO .
 

MattG

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Cheers.
It will be done, but I think it 'm gonna be playing with the squish on my Ms 260 first, as I have a spare P&C I may just do a bit of timing at the same time, just to get the hang of it.
Just remember, if you are using solder use thin 1mm thick eleccy stuff, place at 4 equal spaced points - since the piston will rock v. slightly, and due to present of any weird casting anomalies place very close to the edge of the piston. Rock the crank several times back and forth over TDC, and take several measurements especially where the solder got squashed the thinnest. And last but not least clean the top of the jug pretty good first, since there's no point measuring how thick your carbon is too!

I've read that "plastigauge" can be used too - never used it myself - so can't advise. Wondering if it's everything like that plasticene sh!te we used to mess around with in primary school.....I always remember jumbling up all the different colours and the whole lot just ends up being brown :)
 

MattG

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Quick update on this saw. Re-capping, I ditched the BG, and cut a nice tight squish using the emery paper on an old piston trick. As I'd got the compression tester out testing a customer's saw, I thought I'd check out this second 200t of mine, since it's completely broke in.....check this out (@Lone Wolf )....

2018-01-25 17.46.39.jpg
 

Lone Wolf

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Quick update on this saw. Re-capping, I ditched the BG, and cut a nice tight squish using the emery paper on an old piston trick. As I'd got the compression tester out testing a customer's saw, I thought I'd check out this second 200t of mine, since it's completely broke in.....check this out (@Lone Wolf )....

View attachment 109389
That will give the climber fits pull starting.
 

Lone Wolf

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They need to man up then! I can do it! :)

(Not that I climb everyday....)
Well I was thinking of seasoned guys that have injuries from repetitive use over decades and decades actually. Just giving you input from guys I have worked on saws for.
 

MattG

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Well I was thinking of seasoned guys that have injuries from repetitive use over decades and decades actually. Just giving you input from guys I have worked on saws for.
I do take your point Steve. It is a little beast. And yeah, I know that sometimes you can be in a really cramped position in a tree, like perched up in some branches, and the last thing you want to do is to have fling the saw out, and whack your elbow trying to pull the b@stard over!
 

Lone Wolf

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I do take your point Steve. It is a little beast. And yeah, I know that sometimes you can be in a really cramped position in a tree, like perched up in some branches, and the last thing you want to do is to have fling the saw out, and whack your elbow trying to pull the b@stard over!
Well you sure do catch on fast. This is exactly what the guys complain about. Run it against another and lets see what it gained.
 

blsnelling

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I suspect the difference in starting between these two saws is due to the carbs, not a result of squish modifications. Every machine is unique.
 

MattG

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Well you sure do catch on fast. This is exactly what the guys complain about. Run it against another and lets see what it gained.
Yeah, could do that Steve. Best thing is probably to loan it to one of my tree guy customers, and have them run it for a day.

Going back to what you said re. it being harder to start in a tree.....well I wouldn't build one for a tree guy unless he explicitly asked for one. It aint exactly a walk in the park doing that kind of engine work.

I suspect the difference in starting between these two saws is due to the carbs, not a result of squish modifications.
Yeah I reckon you're right Brad. Now I'm getting better at dialling these carbs, a lot of my 200T setups are becoming pretty easy to start - as long as you've got the room to yank the rope out enough!
 

MattG

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Well the next project I'd like to get my teeth into is "trying to make a 201T as nice as a 200T".

I think Brad's done a lot work on that subject over in the states - particularly regards performance. But I think the work is overdue here in the UK, as more and more guys are needing to start using 201s.

As well as performance mods I'd like to think about weight mods: can the flywheel be lightened? can the jug be lightened (drilling the fins strategically)? the muffler, lighter bars, etc etc. I'm sure there's some fun to be had right there.
 
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