Stihl ms231 hard to pull

[aidank]

I have a Stihl ms231 and it's hard to pull.  I took out the spark plug and it freewheel over.

 

4 5 year old saw not a lot done.  Had carb seals replaced a year ago petrol eats them apparently 

 

Idles perfectly 

 

Starts perfectly it gives its cough after 3 drop starts same as when new.  Flick the choke and then it will start first pull.

 

It was over revving last day I used it so I gave the H screw one turn anticlockwise and going v well now.

 

Any ideas on the hard to pull over

 

 

[Stubby]

37 minutes ago, aidank said:

I have a Stihl ms231 and it's hard to pull.  I took out the spark plug and it freewheel over.

 

4 5 year old saw not a lot done.  Had carb seals replaced a year ago petrol eats them apparently 

 

Idles perfectly 

 

Starts perfectly it gives its cough after 3 drop starts same as when new.  Flick the choke and then it will start first pull.

 

It was over revving last day I used it so I gave the H screw one turn anticlockwise and going v well now.

 

Any ideas on the hard to pull over

 

 

Don't understand re " hard to pull over " Idles perfectly "  If it was over reving maybe an air leak . Might have nipped up ?

[aidank]

21 minutes ago, Stubby said:

Don't understand re " hard to pull over " Idles perfectly "  If it was over reving maybe an air leak . Might have nipped up ?

The pull cord is difficult to pull to get it to start.

 

Its when it gets to top dead center as you are pulling the cord it gets difficult pull the cord, 

[Stubby]

1 minute ago, aidank said:

The pull cord is difficult to pull to get it to start.

 

Its when it gets to top dead center as you are pulling the cord it gets difficult pull the cord, 

Maybe a bit of carbon on the top of the piston connecting with the spark plug ?

[aidank]

2 hours ago, Stubby said:

Maybe a bit of carbon on the top of the piston connecting with the spark plug ?

Sparkplug in perfect condition I had it out earlier 

 

At the start of pull it is easy then compression builds up and it gets v hard. Once over this tight bump, Cycle repeats 3 times approx and cord is fully extended.

[Mark_Skyland]

Is it the c be version with the easy start?

If so check the starter mechanism, its a bit more complicated than standard starters and it might be causing the issue that you have.