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Hi, I have a Husvarna 357XP chain saw. It wont start. Checked whole thing: Compression, bore , piston Carburetta Spark plus fitted new plug Mixture strength correct. Fule flow fine It was working fine. Left it overnight. Following day would not start. Do you have any suggestions?

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  • workflow Aug 30, 2010

    Hi, Thank you for the suggestion. Unfortuantely it doesn't work on my machine. I had already tried that idea however after your note I did give it another go. To no avail.
    The machine has had little use perhaps 12 hours since new . Moreover the machine has a good fat spark . That would suggets that the coil is ok.
    It had been working fine for the past three days, starting well and running fine. When I went to start it on the next day noy joy at all , not a single fire after many many pulls..

  • workflow Aug 30, 2010

    Hi, Thank you for the suggestion. Unfortuantely it doesn't work on my machine. I had already tried that idea however after your note I did give it another go. To no avail. The machine has had little use perhaps 12 hours since new . Moreover the machine has a good fat spark . That would suggets that the coil is ok. It had been working fine for the past three days, starting well and running fine. When I went to start it on the next day noy joy at all , not a single fire after many many pulls..

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Did the kill switch go bad? did you squirt some gas in the piston and see if it will fire? How about the brake? You might be looking too hard. It could be something real easy. Hope this helps.

Posted on Aug 30, 2010

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Take the plug out and warm it up inside your oven at 125 degrees for ten minutes. reinstall and try again
it works for me and tells me the electronic coils is starting to go bad

Posted on Aug 29, 2010

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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

1 Answer

Can't get it started after new spark plug (gets spark), new gas, good compression tried starting fluid. Whats the problem?


Quick way to check condition of the engine is to remove the muffler. Also make sure that the spark arrest screen is clean. With muffler off, examine the condition of the piston and cylinder. If the piston looks burned and cylinder is scratched, saw will be hard to start. The cylinder and piston should look very smooth. Secondary test to verify condition of engine is to spray plenty of wd40 in cylinder and around piston, then pull the starter slowly. If you see lots of bubbles as you pull, indicates compression is leaking and will be hard to start. If cylinder/piston are in good condition, use new spark plug and retest.

Oct 18, 2011 | Poulan Wild Thing 2375 18" Gas Chain Saw...

1 Answer

Homelite UT10540 chainsaw was cutting fine..cutting thru a 6" stump of Yew, started to labor, backed off gunned it back and resumed cutting...same thing but engine stopped. Noticed it was smoking a...


Hi and welcome to FixYa, I am Kelly. This sounds as if the engine leaned out big time. You may have a hole in the piston. Perform a compression test looking for 110 PSIG minimum. There is a bit of a compresion release due to the design of the cyliner head so you will not see full compression on a compression test. Your compression should be 110 PSI or above. There is the possibility you also have a fuel supply problem that caused the engine to run lean. This could be from debris in the carb or a hole in the carb diaphragm(s). I know this is a 35cc engine and has a 14" bar unless you changed it to a 16" bar.

Parts:
http://www.ereplacementparts.com/homelite-ut10540-35cc-chain-saw-parts-c-18807_21362_127279.html

The piston is in detail D but appears to NOT be available. (no release date)

This engine takes carb repair kit H142-42 (Ruiing) The kit is under $6.00.
My real concern here is that you added fuel to the cylinder and did not get a momentary start (new plug too). That is why I think you may have a hole in the piston from running lean. (Compression test is a must) If you do not have a compression tester... fit a paint brush handle (form it) so that it does not penetrate any deeper than the electrode of the spark plug into the cylinder but make it a tight fit. When you pull the recoil do it with conviction. It should pop the paint brush about 10 feet if you had it TIGHT in the spark plug hole. Also use a flash light and do what you can to inspect for about a 1/4" hole in the piston. (Won't be easy to see the whole pistion head)

Thanks for choosing FixYa,
Kelly

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1 Answer

357xp 359 After 15 to 30 min. of cutting engine gets extremly hot and cuts off. Checked spark plug,air filter, and made sure all cooling system components are cleaned. I was told it may be the...


The ignition coil is attached to the spark plug cable.Also check the spark plug number for the chain model.As the chain get older you can put a cooler spark plug and try before change the coil.

Nov 08, 2010 | Husqvarna Chain Saw Maintenance Kit 357xp ...

2 Answers

Hi, I have Husqvarna chain saw model 357XP serial no 2006100483. The saw has suddenly refused to start and engine does not even fire. I was using it one day and on the next could not get it to start. I...


Hi workflow,

Let me thank you for the excellent description of your problem, the symptoms and whats been done so far.

You have done everything I would have done so far.
If you have fuel, compression and spark, there is only one thing left, air.

  • Check the air filter for particulate matter and clean if needed
  • Check the choke linkage
  • Check the carb / trigger linkage
Withe the plug out, pull the cord a few times. The fuel air mix should come out as a fine mist.

How high is the compression? >80psi?

Have you tried starting ether?

Off the top of my head,

Mike12ca0de.gif

Aug 30, 2010 | Husqvarna Garden

1 Answer

Need help on chain saw


This sounds like the engine was run without oil in the fuel. Remove the muffler and spark plug so that you can look at the cylinder wall and piston skirt. If these surfaces are badly scored, the compression in both crankcase and cylinder head will be nearly non-existent. This will prevent any intake of fuel into the engine. Replacing these damaged parts plus labor will likely exceed the cost of a new similar saw. Hope this helps!

May 20, 2010 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

2 Answers

1990 318i engine no compression yet timing chain ok cam and lifters working pistons going up and down has spark 0 compression wont start


I suggest you bring the pistons to TDC, one at time on the comprssion stroke and do a "cylinder leakage test". Put compressed air into the spark plug hose and try to detect where the air is going. If you have the piston exactly at TDC, it will stay there when you put conpressed air in the hole, if it's off a little it will push the piston down. If you have the valve cover off you can watch the valves to determine if you have the pistons on the compression stroke. You should be able to buy a fitting from an auto parts store that will thread into the spark plug hole. If not take an old spark plug and bust the guts out of it and weld a pipe fitting to it to adapt your air compressor hose.

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1 Answer

Husqvarna 357xp flooding


2 things you might want to look at.
1) Vacuum test your fuel line. This is a common problem with huskys.

2) Check to see if the exhaust port or spark arrestor screen is plugged up. If so pick out a carbon deposits.

Apr 09, 2009 | Husqvarna Chain Saw 20" Bar

2 Answers

46 cc Sears/Poulan chainsaw will not start


Four things I can think of:
1) There is a short in your spark plug wire. When you bend it to connect the plug in the machine it allows the exposed cable to contact the engine block. Examine the wire all the way to the coil.

2) Flywheel key is sheared ( you obviously know how to take off the flywheel since you checked the seals).

3) Flywheel air gap is not set correctly. Loosen the coil. Put the cover of a notebook or the cardboard piece of a cigarette pack between the magnetic portion of the flywheel and the coil. Tighten the coil down. This will get you the proper gap.

4) Your cylinder/piston or rings are scrubbed out. Even though it passed a compression test, on rare occasions it will loose compression only when it fires. So do the following:

Remove your exhaust manifold. Look into the cylinder with a flash light. You are looking for scratches. Anything larger then a light fingernail is definite proof you need a new cylinder/piston assy.

If it passes that test do the following:

Pour mixed fuel straight into your cylinder until 1/4 full. Slowly pull your saw over while looking into the cylinder. If you see bubbles after the ring/rings go by then you need a new cylinder/piston assy. On rare occasions if no scratches are present on the cylinder wall or piston, you may be able to change just the rings.

First if you can get a inline spark tester so you can see if your getting spark with the plug installed.

Mar 24, 2009 | Poulan Pro Chain Saw 46cc 20"

1 Answer

Wont start


remove the muffler and see if there is scoring on the piston.if ther is the saw needs piston and cylinder.sound to me that there is a lack of lubercation to the cylinder

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