engine firing

[bill]

borrowed a mates 66 the other day. it hadnt been used for a while, started it up and after a while the engine started to make a miss firing noise. like loud pops? anyone know whats going on? it had plenty of power when is wasnt making that noise but it didnt tick over for very long.

[Husqvarna King]

next time borrow a 390/395 xp:wave:

[Dean Lofthouse]

borrowed a mates 66 the other day. it hadnt been used for a while, started it up and after a while the engine started to make a miss firing noise. like loud pops? anyone know whats going on? it had plenty of power when is wasnt making that noise but it didnt tick over for very long.

 

Sometimes when they have been stood for a long time then started, the carbon that was on top of the piston peels away and gets onto the spark plug or in the gap of the spark plug.

 

It then gets hot and causes premature firing or misfiring.

 

Try cleaning the plug, you may have to do it a few times till the carbon has gone.

 

If when it starts the symtoms and you inspect the spark plug to find no carbon deposits in the gap, it may be someting else.

 

It could also be loose carbon ontop of the piston causing a hotspot and a misfiire or popping

 

Just something to try

[bob]

could be the de compression valve sticking open

[Husqvarna King]

the 66 engine sounds shite anyway....surprised u noticed:proud:

[Rentachimp]

I'd like to say that husqvarna smell of poo, just to make this thread a little less biased.

[Dean Lofthouse]

Can't say I've ever had problems with stihl.

 

Can't say the same for Husqvarna.

 

Last one used to shake it's exhaust off every two minute and snap exhaust bolts in the head for fun. Clutches disintegrating etc etc

[18 stoner]

the 66 engine sounds shite anyway....surprised u noticed:proud:

 

Is that a stihl in your avatar though, it looks 660ish?

[18 stoner]

Just a thought bill, if its not been run for a while, did you tip the fuel and refill before running it?

[Husqvarna King]

Is that a stihl in your avatar though, it looks 660ish?

 

 

Im very sad to say that it is a 660....has power but sounds crap and i have had loadsa probs with it...have never been let down by a husky as yet