mikerecike

I've just got some 'simplegreen' american eco degreasing product - haven't tried it - will let you know when it gets used

No they're part of the Draper 'Rustic' range I think

well done for seeing it through Rich - epic/saga/odyssey - fair old trek whatever - can't say I'm 100% clear what the final diagnosis is really?

Well I'm back to some sort of short circuit that is 'repaired' when the choke is pulled out - I've never done one of those saws but if it's like some others I've seen the kill mechanism is not a milion miles away from other levers. I also had a carb/air filter cover that was squashing wire and causing a short. Also wondering about wire layout/problems in the throttle / trigger /handle.

Full between the ears service £45 plus parts and VAT hang in there rich:thumbup1:

Beat me to it - yep - just about all that's left now! COIL Unless of course Rich is hallucinating and the saw is running fine - in which case we need pharmaceutical expertise - you do that too Spud? Or try the mechanical route and a ported temporal lobe?

OR it could mean the mix isn't volatile enough without choke with a weak spark in the cylinder - spark inside and spark outside aren't always the same - try re-gapping your new plug to 16 thou

Good one Mark - said this some time back about new plug but one thing I would do Rich before the piston replacement is re-gap the spark plug to 16thou

Teacher as well Barrie whether you like it or not, same applies to Spud, Rich and everybody here willing to share their expertise. "Thank you, sir, may I have another?"

is it well and truly bolted on - i tried to tune a strimmer last night that couldn't reach max revs - saw later that the bolts were loose

Rich - my intuition is telling me it's something to do with the exhaust and back presure - have you checked that side? Talk about rallying the troops! There's some good stuff going on here.

Will it run if you don't fully close the fuel cap?

new plug? plug gap? flywheel gap?

I'm sure Barrie probably uses such a thing - i saw on a stihl video recently a sheet that was like a checklist for saw servicing - anybody got a copy they can share?- all contributes to what's a reasonable charge debate

I think you tune electric saws by altering the length of the governor springs

Non chainsaw alert!! Ryobi strimmer – new fuel lines, primer bulb, gaskets and dias. Zama C1U Thought the gaskets and dias would sort the not holding pressure prob – no. The flow went in the fuel pump side and straight out the metering side – glass jar showed this up. Problem was the metering lever height – bent it up which seated the needle and fired it up last night – tuning later tonight. How do they get so bent out of correct position? Not quite spuds led zep in the modding/porting zone but I am gonna open the painfully small exhaust outlet under the shroud – gotta start somewhere! And finally picked this Hayterette up at a boot fair at the weekend – it was getting one of these running again last year (from a pile of scrap metal) that was the equivalent of the first hit of crack cocaine for my engine addiction. Oil-less life until that point. Sold it soon after and regretted it ever since. This is early 60’s vintage – same as me – got a lovely look in my opinion. Carb clean, points clean and gap (there was no spark), rebuild the recoil and craft some tabs to keep the spring in and off she went phut phut phut – cut an acre of field – joy.

yep i'll echo that - these linkages always catch me out - good pics really help

Mityvac MV8500 I use Rich - [ame=http://www.amazon.co.uk/Mityvac-MYMV8500-Silverline-Automotive-Diagnostic/dp/B004BYGSJI/ref=sr_1_2?s=automotive&ie=UTF8&qid=1362403385&sr=1-2]Mityvac MYMV8500 Silverline Elite Automotive Repair and Diagnostic Kit: Amazon.co.uk: Car & Motorbike[/ame]

pmsl

All good stuff to deepen the understanding - the recordings are a real good idea - cheers Tintin

I need to digest that and experiment with it - thanks a lot Spud - that's the first time i've had that explained - appreciated

please remind me what 'fourstroking' actually is. I'm sure I'm tuning to it but have no idea what the term refers to or how to confirm it?? cheers

Thanks Bill, Spud and Barrie- that's helpful - appreciated