Chainsaw Repair

I run Bosch 5E or the plug called for the Huskys 6 or 7

Here is a spark plug converter for plug you listed.  http://www.sparkplug-crossreference.com/convert/CHAMP_PN/CJ4



Details about Champion CJ4:

    Threaddiameter: 14mm
    Threadreach: 9.5mm
    Seattype: flat
    Hexsize: 19mm
    Tipconfiguration: non projected
    Construction: Standard construction
    Terminaltype: Solid

Possible spark plugs:

    AC Delco CS41
    Bosch WS5E
    Brisk P15
    Champion stk 862
    Denso W22MUS
    Denso W22M-U
    Denso W22M-US
    Denso stk 6026
    Eyquem 755CT
    Motorcraft A2NX
    Newstar L8C
    NGK BM7A
    NGK 4226
    NGK 6521
    NGK BM7
    NGK BMR7A
    NGK 6321
    NGK 7497
    NGK stk 6521

I think the "Y" is an extended tip spark plug?

The RCJ6Y as shown for the 330 and 3750 is the same as what is almost the standard big chainsaw spark plug for most chainsaws in recent years.

Though some of the newest saws, to come out in the last year, have the new 10mm spark plugs.