Hi,
I started finding this strimmer difficult to sart and would not run at full throttle, as if the choke was on. Thought it might be mixture problem.
Tried adjusting what i assumed was the carburettor air / mixter screws, now will not start / run at all.
Is there a starting point for these screws ie. fully closed then 1 1/2 turns out ?
Any help would be great.

Many Thanks

T Dickerson

T Dickerson, May 2005

yeah - I was repairing one and, even though I had bought new gaskets - looking at the internals - I realized it was such crap I could see all the bits that would fail. It was so crude - almost like it had been assembled ina shed not a factory - almost 'bodged' (but this was its state from the 'factory'). I thought...and incredibly I was calm...I thought this is a big load of trouble, just dump it and get a proper one. which I did.

dave, May 2023

I work on an awful lot of these machines and identifying the parts is key , the carbs are more often walbro and parts are readily available , the main dealer for mcculloch is Simmonds saws near Cambridge uk they can source most old stuff , modern stuff is made by Husqvarna. and has been for some time

small plant and machinery services, August 2014

my as been the same.
wont start and doesnt seem to have a spark either ...
any answers??????????????????

alan, May 2012

hi looking for coil pack for this model my one runs for 9 minuets then cuts out no spark

Garfy, March 2012

what should the fuel mixture be

tom, November 2011

I, too had exactly the same problem. I found that the fuel inlet tube was disintegrating and letting air in so that the carburettor wouldn't suck. Replaced that, (bit fiddly getting at the filter on the end of the old tube, but a piece of bent wire fishes it out) and everything seems to run ok now.

John, May 2011

hi mate, i have one of these as well, it had exactly the same problem. i found if you screw the screws all the way in, then 2 full turns out it should run. then its just a case of starting it and letting it warm up, then full throttle and see what it does. mine was running but was very smoky(it wasn't the mix) and a bit gut less so i screwed the left hand screw in a tiny bit (while still running) and try full throttle again. if it is still gutless, screw left hand screw in a tiny bit more. if it still gutless repeat this process. that should do it. ALSO IT MIGHT BE WORTH EMPTYING THE FUEL AND RUNNING IT ON NEAT PETROL FOR A LITTLE WHILE TO BURN UP ALL THE EXCESS OIL IN THE CARB AND CYLINDER. hope this helps and please let me know how you get on. my email is: carpkid14'googlemail.com. Brian.

Brian__ carpkid14, December 2009

mcculloch is pure scrap - never ever buy one (small engine mechanics point of view). my guess is that the carb needs new diaphrams and gaskets. i'm working on one now and parts are near impossible to get!!!

technical impossibility, June 2009

Hi. Mine starts on full choke but wont run for long when i put it to half choke, its like a fuel starvation or something any ideas ?

Gaz, August 2008

i have just had the same problem with mine screw them right in, turn the screw one full turn out,prime the strimmer about five times then try and start it with out choke, with your finger on the trigger but make sure the plug is clean,

darren, April 2008

Sounds like U nead 2 clean the plug & air filter!!

STRIMMMMMMAAAAA A A A AAAAAAAAAAAAAR, November 2005

the start for these screws are both one turn out

brian, October 2005