Unable to start MS170 so advice needed for me to rule things out

[ipbr21054]

What is the purpose of this item.
It sits between engine block & coil.

Surely without it the coil will still operate as the bolts mount flush with the coils metal part so shorting out isnt an issue.

So assume for vibration etc ?

Just trying to look at every possibility now.

 

[Burnerman]

This is a heat insulating spacer, and won't stop the coil working.
As you've found, the key is part of the flywheel on these engines and yours looks fine.
I have to conclude you have a dud carburettor here.
John

 

[ipbr21054]

Hmmm
On ebay & Amazon market is flooded with chinese copies even well known garden suppliers are selling chinese copies.
Dont want another but what can i do as original is £££££££££

 

[ipbr21054]

The photo i supplied was taken from internet to show there isnt a separate woodruft key & is part of the flywheel as shown.

I then took mine apart again & see photo of what i found.

So i would say as i am getting a spark it isnt at the correct time hence why im having these issues.
If key was 100% present the spark can only be made at around TDC and mine isnt so i dont think it is sparking on the correct stoke / time.

Majority of mine is missing & i found it stuck in crank.

What do you think now ?

My luck would be also something else ha ha

 

[Burnerman]

It looks like the flywheel key has sheared (from here, anyway) so a new flywheel is required.
Is the crankshaft key slot damaged at all?
John

 

[ipbr21054]

Crank is fine so i assume spark doesnt fire at correct time, another flywheel has now been ordered

 

[Burnerman]

Just a word of wisdom when fitting the new flywheel........grip the flywheel as you tighten the nut - avoid the temptation to hold the other end of the crankshaft as it will twist.
John

 

[ipbr21054]

Ok thanks.
Don’t want to break it off.