spudulike
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Everything posted by spudulike
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Very possibly lack of compression. When cold you have enough to start it but when warm, it drops to a low enough compression to stop it starting - had machines like that before. Do a compression check when warm and make sure it is 140+. Other than that, it may be carb settings but less likely.
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Classic circlip damage, doesn't look nice!
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Keep us informed, sounds an interesting one!
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If this is your ported one, I hope you beveled those ports well!
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Have you looked down the plug hole for signs of seizure on the cylinder wall?
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You need to find out if the piston is definitely stuck, it is unusal unless moisture has started to oxidise the piston against the cylinder. Usual way is to get a load of oil down the bore and get a plumbers lamp on the cylinder and get some heat in it whilst you have a wrench on the flywheel or clutch nut rocking it too and forth. If the piston is covering the exhaust port, then you can fill the cylinder right up and use the pressure of doing the plug up and expansion of the oil on heating to get the lube around the piston to free it:thumbup:
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Mmmm, nice. I have had a few MS200s in with "a carb issue" that were sorted by replacing the clutch springs because one was broken!
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At least it wasn't terminal, many of these type of faults are, all ended well:thumbup:
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Torqued means done up:001_rolleyes:
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No, as long as it has been torqued down and is in its plastic cradle saw body!
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If it is between the cylinder and crankcase, it can be tested immediately after assembly
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Not yet - it is some sort of Motocross expansion pipe by "Doma" off a Kawasaki KX85 - similar bore and stroke to the 066 - should be a laugh once it is modified!
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Try it, all you are trying to do is increase flow through the exhaust, I would run both outlets together rather than just one.
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Mmm, thanks Barrie:lol:
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Check the screw on the orange air filter cover still has both sides of its end - the bit that screws in to the inside of the airbox - it is common for one of these to get damaged by heavy handed operators. Other than that, a circlip that has come out and is now embedded in to the piston crown is possible! Damaged small/big ends generally cause lack of compression but don't cause this locking up. I would say you have got something embedded in the top of the piston crown or the top of the cylinder:thumbdown:
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You cant say that with no pic!!!!
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I had a dog biscuit in my lunch box today, the wife made my sarnies, gave me quite a start. She had been wondering what had happened to it:001_rolleyes:
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On the 346XP there is no need to do this, an enlarged existing outlet makes the saw louder but not excessive. You may find your muffler is now much louder with the straight through pipe but see how it goes! Normally I leave the old pipe as it is - no need to seal it!
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Quite correct, generally the standard carb will suffice for a woods ported saw and I would only come away from this if I were engineering something quite radical! I do have a bit of software that calculates all the variables but it gets a bit complex and isn't that conclusive!
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I open the existing hole in the exhaust up - it is a simple mod on this saw!
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No, a smaller bore will inrease velocity and increase the draw on the fuel. I have ported a few of these saws now and not needed to go to the lengths you are looking at going to. The carb can only deliver the amount of fuel/air it is designed to deliver so if the engine is radically modified, it may benefit from a larger bore carb but I have found that mine is verging on dark brown and is pulling 15,000rpm! I reckon you will open a bag of worms if you do this - I have heard of some tuners opening the carb bore up!
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So when I fix up MS200Ts, I need to climb up a tree to test it:confused1: Guess it will be useful to test it at altitude:blushing:
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Been porting a 372XP today, took a while to clean it up but is coming along well. Unfortunately the clutch side seal failed the vacuum check so needs replacing - just as well I found it as it would have gone pop in a short while:thumbdown:
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Mine runs a H screw setting of around 3/4 turn - it is normal, no need for a bigger carb, the extra flow through the carb pulls up a lot more fuel through the high speed circuit as the venturi effect of the carb is greater because of the flow!
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Right - the 357XP - what has been done to it and what are you trying to achieve? a bigger carb will deliver more fuel/air to the saw - you are trying ot LEAN it down???
