Question about Stihl Ts400 Cut Off Saw Carb Carburetor Air Filter

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Starting ts410 Fitted new cylinder and piston and carburetter but machine wont start

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This might be an ignition problem... Try setting in new fuel if that doesn't work take it to the shop.

Posted on Jan 01, 2015


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2009 Aprilia SR 50R factory I put new pistion,rings gaskets and cylinder will not start only have 65 LBS of compression whats up this motor

65 lb compression doesn't sound very much but could be fairly normal on a fairly highly tuned 2-stroke at kickstart speed, especially if the piston, rings and bore are dry.

Exhaust tuning causes a 2-stroke engine to grow in capacity when it is "on the pipe" resulting in a sudden increase in compression ratio and pressure and so if this is not to cause devastating detonation the designer must make allowances and probably utilise electronic automatice timing retard. Starting with a lower compression ratio is another method.
Having said that I would have expected at least 100 psi pressure and probably a little more...

Assuming you checked the new cylinder thoroughly before fitting and ensured all the ports including the transfer ports are open and correctly line up with any ports or recesses in the crankcase and ditto with the base gasket...
Assuming you checked the piston size matched the new cylinder and the piston rings were correctly gapped prior to fitting...

These things should not be taken for granted and should be checked to ensure they are correct. Assuming you did these things and assembled everything correctly (especially getting the piston the right way around) with a smear of clean oil a good induction should be assured and the compression should be almost as good as it is ever going to be.

I suggest you ensure there is a good spark and fuel is reaching the cylinder. If it isn't I suggest you revisit the new parts you fitted and the way you fitted them before investigating anything else.
Good luck!

Sep 23, 2016 | 2009 Aprilia SR 50 R Factory

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Sthil ts410 fitted new barrel &piston runs ok till air filter housing is on ok with just filter till plastic housing is on all air ways to housing have been stripped and cleaned

check that the gasket to the barrel is installed correctly and not upside down blocking of an air hole to the carby
the problem is that the fuel level is excessive causing flooding when the filter is fitted
that is normally from lack of control to the carby diaphragm from blockage or vacuum hole problem
if you have reconditioned the carby , check the way the diaphragm has been fitted in relation to the gasket

Jun 23, 2016 | Garden

1 Answer

I fitted new injectors on np200 1.5 dci, now it has hard starting have to tow start or use quick start.then it produces a thick white smoke when it starts.

Thick white smoke often means something besides gas and air is getting into the cylinders. Possible blown head gasket, holed piston, etc.

May 16, 2015 | Cars & Trucks

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Stihl saw cuts out when machine is tilted forward on ts410 anybody else have this problem

Fuel pick up will be your problem. Buy new fuel filter and fuel line from in tank to carby. Most likely a split in the fuel line in-tank

Feb 13, 2014 | Stihl Ts410 Ts420 Cut Off Saw Piston Kit...

1 Answer

Stihl Ts410 hard to start and erratic running

I've added the breakdown manual for you, have you replaced the fuel and air filters. could be a simple issue of not being able to draw up the fuel from the tank. Stone saws deal with a lot of dust and this seriously effects their running and also their cooling capabilities.

Jan 31, 2014 | Stihl Saws

1 Answer

Ts410 stihl saw stopped working

Starting procedure for Stihl.
(cold starting)

Place cutoff saw on floor (flat clear surface).
Hold throttle in, while pushing on switch all the way down.
Hold cutoff saw firmly.
Pull starter handle until saw fires, it should then cut out.
Click the starter switch up 1 click to half choke.
Pull starter handle again until cutoff saw fires up. note: it will be reving because the trigger is loched on, (blip the throttle once) and it should go to tick over.

There should be np need to keep playing with the choke when the saw is warm. No need to lock the trigger when starting warm..

Mar 31, 2013 | Stihl Ts410 & Ts420 Cylinder & Piston Kit

2 Answers

Apart from using the wrong mixture of 2 stroke engine oil and petrol what causes the pistons to be dameged on a ts410 stihl saw

Power cutters run in a very dusty enviroment, if concrete dust passes the filter and enters the cylinder it will very quicky remove the plating on the cylinder and wear the piston skirt, once into the bearings it will destroy them, if the rings are badly worn ( remove them from the piston and check the end gap by entering them into the cylinder, if the gap is excessive you have had dust entering the cylinder )

Mar 06, 2013 | Garden

1 Answer

Hi, My stihl saw ts410 is really hard when i pull the starter coil, I have changed the cord and it seems as there is no compression could this be seized and if can i fix this myself and what would i need...

It could be seized, or had dust throught the filter wearing the piston and rings, if this is the case it will be a new cylinder and piston required, it is possible to do it yourself if you have a good knowledge of mechanics.

Jan 17, 2012 | Stihl Saws

1 Answer

Dear Sir, can a gl1000 be re,bored & fitted with

Yes it can be bored, .050 over is fairly common on this bike. Before boring the cylinders, the new pistons should always be matched to the old ones. You always find problems with aftermarket parts. Have the cylinders bored to match the new pistons. Don't bore the cylinders and expect the new pistons to be a perfect match. I hope this helps.

Jul 03, 2011 | 1976 Honda GL 1000 (K1)

1 Answer

My passat 1999 tdi wont start after new timing belt fitted

If timing belt was replace due ti timing belt failure, more then likely it has piston to valve damage, this engine is an interference engine, to find out for sure, need to do a cylinder compression test, if any cylinder with zero, bent valves.

Jul 22, 2010 | 1997 Volkswagen Passat

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