STHIL TS410 REVING ISSUE

[IAN IDG]

Hi my ts410 will start ok but takes a long time to slow down to idle from full rev & will cut out & then is difficult start, Sometimes it will not slow down at all.

I have checked the idle adjustment on the carb and that is correct , I have tried a new carb but still have the same problem, The throttle trigger is not stuck either.

can anybody help.

[spudulike]

"Checked the idle adjustment", are you saying you can undo the screw until it has no effect and the engine is over revving? If so, check the crank seals!

[adw]

The 410 was not Stihls finest hour, however with any power cutter air filter maintenance is everything, if this machine has has concrete dust through it, it will have cylinder and piston wear, possibly main bearing wear as well which in turn allows the crank seals to leak, so if you are sure the replacment carb is good, then my best suggestion is engine internal wear, quick plug for the Husqvarna K700, far superior machine.

[spudulike]

Very good unbiased view there Andrew

[adw]

Speak as i find sir, we have done much testing and comparisons on competitors products, and yes i am a little bias, but the 410 was not as good as the earlier 400, try getting the air filter cover off the Stihl, the screws thread into brass inserts which turn in the cover so you very often have to cut the cover off, and whoever decided to fit the starter on the drive side with a plastic pawl, i could go on but probably going to get bombarded by TS410 users telling me how marvelous they are.

[dumper]

9 hours ago, adw said:

Speak as i find sir, we have done much testing and comparisons on competitors products, and yes i am a little bias, but the 410 was not as good as the earlier 400, try getting the air filter cover off the Stihl, the screws thread into brass inserts which turn in the cover so you very often have to cut the cover off, and whoever decided to fit the starter on the drive side with a plastic pawl, i could go on but probably going to get bombarded by TS410 users telling me how marvelous they are.

You are right pile of poo another vote for husky although mines electric 

[IAN IDG]

14 hours ago, spudulike said:

"Checked the idle adjustment", are you saying you can undo the screw until it has no effect and the engine is over revving? If so, check the crank seals!

when I first start the engine from cold it will idle fine, When I rev the engine & let go of the throttle trigger it stays at full throttle for some time then very slowly deaccelerates & then stops , there doesn't seem to be anything stuck,

I will try the crank seals as suggested thanks.

[spudulike]

TBH - I have only done TS400s and not the later model - they seemed OK to me, typical Stihl inside.

Done a couple of Huskys but swerve all stone cutters now, all that abrasive dust is much worse in the workshop than the oily crud you get out of chainsaws and if you think most chainsaws are abused.....stonecutters reach a new level of LOW!!!

I don't think operators can grasp that the powder from cutting stone is highly abrasive and a clean air filter is your friend

[IAN IDG]

4 minutes ago, spudulike said:

TBH - I have only done TS400s and not the later model - they seemed OK to me, typical Stihl inside.

Done a couple of Huskys but swerve all stone cutters now, all that abrasive dust is much worse in the workshop than the oily crud you get out of chainsaws and if you think most chainsaws are abused.....stonecutters reach a new level of LOW!!!

I don't think operators can grasp that the powder from cutting stone is highly abrasive and a clean air filter is your friend

I try telling my customers to attach the water bottle  but it falls on deaf ears ( keeps me busy though )

[spudulike]

That sounds like a sticky throttle as an air leak may cause the idle to be higher than usual, the engine to rev much to high on full throttle, perhaps a lag in pickup and holding on to revs rather than snapping straight down to idle when the throttle is closed.

If you rev the engine flat out and the revs stay flat out and trop very slowly than the first thing is to check the carb throttle assembly, carb throttle return springs etc are all clean and lubricated and make sure that when you release the throttle, the throttle valve (brass disk in carb nearest the engine) snaps completely shut.

You can start the thing with the top cover off and manually push the carb closed with the small plate the carb throttle rod fits to after revving to make sure the mechanism does work and if the saw drops back to idle as it should, your throttle is sticky.

If the engine still takes time to drop back to idle even with you pushing the throttle valve closed, it is most likely an air leak.