Husqvarna 435 wont start driving me nuts

[CEE]

Yes the fast idle mechanism is work fine I checked it. then once you blip the throttle it goes down to normal idle but in these tests it's been on fast idle. I fgiure it needs all the help it can get.

 

L is set to 25 turns out and H is set to 2 turns out.

 

I opened T outwards 2 turns while the carb was off and looked to make sure that there is always the tiniest tiniest crack on that butterfly so it can't be 'under' idling. Anyhow turning T back in 2 turns makes no difference.

 

Like I said it is the spawn of the devil.

 

It will be 'something' of course it's just that it would have been easier in hinddsight to chuck it out and buy a cheapo every coupe of years and I bought a premium brand so i would not have to be in this position so i am quite annoyed at Husqvarna to be honest.

[CEE]

it could be lots of things

 

for example the impulse tube goes out of a hole in the piston case, it's then coupled with the inlet manifold with a rubber gasket thats built into the inlet manifold, it rusn though the manifold and comes out and is coupled to the carb by a similar rubber gasket - there are loads of ways for this to go wrong what a crap design, but the gaskets look perfect and they seem to but up against the metal surfaces very well....

 

but the tiniest gap in one of them would make it fail

 

but that would mean buying a new inlet manifold which will be full price OEM - just on the 'off' chance...

[gary112]

2 hours ago, CEE said:

it could be lots of things

 

for example the impulse tube goes out of a hole in the piston case, it's then coupled with the inlet manifold with a rubber gasket thats built into the inlet manifold, it rusn though the manifold and comes out and is coupled to the carb by a similar rubber gasket - there are loads of ways for this to go wrong what a crap design, but the gaskets look perfect and they seem to but up against the metal surfaces very well....

 

but the tiniest gap in one of them would make it fail

 

but that would mean buying a new inlet manifold which will be full price OEM - just on the 'off' chance...

Just a thought but has it got good compression?Is it possible the ring maybe stuck in piston groove as this can happen with carbon build up,dont know if it would fire though

[CEE]

Oooo ooo a clue - something has happened

[CEE]

I put bradex in the carb intake - couple of sceonds good squirt

 

Pulled it a few times

 

Nothing

 

So its ingintion

 

I dont know how this is happening becuase you can see the spark on the spark plug when it's grounded and I tested the coil at be 0.5 Ohms (the spec) and I have got a 0.3mm feeler guage and set the air gap...

 

But Bradex won't start it

[Mrblue5000]

Not familiar with huskys but the wire going from the coil to the on/off switch could be frayed, causing a short when the cover is tightened up. Might be faulty switch? Spud helped me with mine recently, loose (plug) wire at the coil end was my problem. 

[CEE]

Success

 

It was the coil (or the HT lead connected to the coil)

Even though the coil was supposed to be good - there was a spark when the plug was grounded and the coil tested to 0.5ohms like Husqvarna say it should and the air gap was set correctly... it was the coil.

 

I took off all the stop start wires so they could have nothing to do with it.

 

Put on a new coil and it started.

Put the old coil back on and it didn't.

So either the coil went or more likely I think it was the HT lead on the coil.

So massive lesson learned for me - try the starting fluid early becuase that can really give a big clue and its easy and cheap.

 

Thank you all for your help and patience - I am defo no expert but I have learned something that I won't forget in a hurry and hopefully people in furture will read this thread and it will help them too.

[gary112]

18 minutes ago, CEE said:

Success

 

It was the coil (or the HT lead connected to the coil)

Even though the coil was supposed to be good - there was a spark when the plug was grounded and the coil tested to 0.5ohms like Husqvarna say it should and the air gap was set correctly... it was the coil.

 

I took off all the stop start wires so they could have nothing to do with it.

 

Put on a new coil and it started.

Put the old coil back on and it didn't.

So either the coil went or more likely I think it was the HT lead on the coil.

So massive lesson learned for me - try the starting fluid early becuase that can really give a big clue and its easy and cheap.

 

Thank you all for your help and patience - I am defo no expert but I have learned something that I won't forget in a hurry and hopefully people in furture will read this thread and it will help them too.

So are Husky,s not so bad now you got it going?glad you got fixed up

[CEE]

Huskys are 'OK' I guess

 

At least now I know this one like the back of my hand so should be able to maintain it for a long time.

[adw]

Told you it was the coil!