Author Topic: Replaced piston/cylinder now won't fire  (Read 1041 times)

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Online jmester

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Re: Replaced piston/cylinder now won't fire
« Reply #10 on: October 19, 2013, 03:20:13 pm »
The small line should be the impulse line and it should run from the crankcase to the carb flange or the pump side of the carb. Try to remove the spark plug and put some fuel in and try it out. With the spark plug not moist sounds like a fuel problem to me. Do you pressure/vacuum check the crankcase. Is your spark threw a tester or the plug grounded on the cylinder. My be a bad plug.
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Offline Cut4fun .

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Offline Cut4fun .

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Re: Replaced piston/cylinder now won't fire
« Reply #12 on: October 19, 2013, 03:26:59 pm »
Service Bulletin for 357XP, 359, 353, 346XP 350
This service bulletin is not new. I thought that there might be some out there who were not aware of it so here it is. If your saw has a black plastic clamp around the intake right next to the cylinder it is applicable to it. If the clamp is of steel construction then you should be ok.

B0600023
SERVICE

*537 43 88-01*
*compl 537 25 13-02
English 1 (1)

SB, 357 XP, 359, 353, 346 XP,
Partition wall and clamp for intake system,
2006-03

The existing intake system on 357XP, 359,353 and 346XP currently consists of an integrated plastic clamp in the partition wall. As the clamp is made of plastic, there is a risk of deformation. This results in impaired clamping force against the cylinder, which in turn can result in leakage in the intake system. To prevent this from occurring, we have now introduced a metal clamp and a new partition wall.

The new partition wall is made up of polyamide with 30 % fibre glass.
The new clamp is a hardened steel clamp. The new material and the design of the clamp reduce the risk of deformation and the subsequent risk of leakage.

Full replaceability prevails.
Introduced from serial number:
357XP 061100201
359 061100001
353 061100001
346XP 061100001

New part no. Description Excl. part. no. Remark
537 25 13-02 Partition wall, intake, complete New spare part
537 43 88-01 Clamp, intake New spare part

Spare part, partition wall, part number 537 25 13-01, has been discontinued and is replaced by part number 537 25 13-02.
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Offline Cut4fun .

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Re: Replaced piston/cylinder now won't fire
« Reply #13 on: October 19, 2013, 03:28:34 pm »
Service Bulletin 357 XP, 359, Introduction of new carburetor for better idling stability,
2008-10

To achieve better idling quality, a new carburetor has been introduced in the production. The new name of the carburetor is Zama C3-EL42, replacing Walbro HDA199A/B and HDA191A.

New part number for the carb is 505203001.

Also, requires a different flange, part number 503928502.

Introduced from serial numbers:
357XP 083800001
359 084500001
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Offline Cut4fun .

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Re: Replaced piston/cylinder now won't fire
« Reply #14 on: October 19, 2013, 03:38:13 pm »
IF you dont want to buy new updated parts listed above post and yours is still usable.
Do the below mod. Use a older husky 372 metal intake clamp IMO.  I think the newer strato 372 intake clamp may be bigger??? thats why I say the old school 372 clamp.

359 intake fix
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Offline wbhburn

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Re: Replaced piston/cylinder now won't fire
« Reply #15 on: October 19, 2013, 03:50:03 pm »
Did not check vacuum or pressure in crank case. Don't know how or where. Grounded testing only on spark plug. My question though is why would any of this change if I didn't fool with it? Someone on another forum suggested CC vacuum leak also. Is there instructions for this some where?

BTW thanks for all the attention. I need to get this running while I still have a chance to cut firewood for my heat.

Offline sharkey

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Re: Replaced piston/cylinder now won't fire
« Reply #16 on: October 19, 2013, 06:49:03 pm »
Basically you need to find out why the cylinder failed in the first place.  Was it drawing air somewhere?  How you find out is to pressure test the case.  You can buy a pump, you can set your compressor regulator down to 5psi, or you can go up to the drug store and buy a big horse syringe.  You dont need the needle, just need the end of the plastic syringe to fit your impulse hose.  Impulse is the alternating suction and pressure wave that is piped off from below the piston crown in the crankcase, and it is used to run the carb's fuel pump. 

To do the test you will need two rubber strips.  If you have an old inner tube cut a couple strips out of it 3 inches long by an 1 1/4 wide.  Place one rubber strip between the muffler and the cylinder, and the other between the carb and the cylinder.  Bolt the carb and muffler back into place crushing the rubber strip to create a seal.

Now take your horse syringe and plug it into that impulse hose.  Put a little air pressure into the case and use some windex or soapy water to find the leaks.  Common leaks are found at the crank seals, where the cylinder bolts to the case and where the carb attaches to the intake.  Make sure the spark plug is tight.       

Offline wbhburn

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Re: Replaced piston/cylinder now won't fire
« Reply #17 on: October 19, 2013, 09:02:15 pm »
So I'll need to remove the handle/tank to get to the crank seams right? 

Offline 660magnum

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Re: Replaced piston/cylinder now won't fire
« Reply #18 on: October 19, 2013, 09:08:57 pm »
If you have a leak and can not find it elsewhere?
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Offline Moodys Modded Saws

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Re: Replaced piston/cylinder now won't fire
« Reply #19 on: October 20, 2013, 01:01:56 pm »
The fix on the HDA carb is pretty simple. Whether it's failed or not get rid of the plastic boot clamp. T8 safety bit and be sure that the transfer caps are tight.

 

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