I am after a manual for my Spear and Jackson Petrol Strimmer

they usually just slot and clip in place, they should have a safety feature to stop you putting it in the wrong way, the latest models just clip in place. If you have probs post the model number which will allow people to give more accurate instructions or links, good luck.

It is 1:40 on my SPJBC 30

I searched and many sites appeared to be malicious.

I found a trustworthy free site with 37 and not 38.

https://www.manualslib.com/manual/841375/Spear-And-Jackson-37-Cc.html?page=56

Spear Jackson 37 cc Operation And Maintenance Manual Page 56

empty the petrol,feed the black line (the fuel intake) into the tank and grab the end of it thats attached to the filter inside the tank. now you can feed a new fuel line through into the tank and reattach to the filter. hopefully this will solve your problem ive just done this but mine still wont start, either flooded or spark plug. by the way i bought mine new and the fuel line was split.

how do I take the strimmer head off and fit the brushcutter blade on my SBC33n1?

20 to 1 is the correct fuel to oil ratio for spear and jackson SHT 26X

It uses the standard fuel mixture of 50 parts of fuel to 1 part of a good quality two stroke oil. That makes it 100 ml oil to 5 litres fuel.

thread the cutting wire

adjust air screw on carbeurtor as it is probably running rich