Greetings MF, CyberJack et al,
I read somewhere here that the G4 based LM plastic carburettor was released in 78 and this featured the primer bulb built in to the white cap.
Hi Mowerfreak
Yep, that's what the evidence says ... but for the
1979 model year ... meaning
The LM was introduced in
September 1978 and was fitted across the range.
Best guess.
There's a Tech Bulletin about the LM introduction dated November 1978 here;
https://www.outdoorking-forum.com.au/forum/ubbthreads.php?ubb=showflat&Number=38908I have a 125 mower with this primer cap along with the label pointing to it. Was this label put on as part of the service bulletin to retrofit the primer bulb cap in place of the plain grey primer-less G4 cap?
This one is probably for
Gadge and others, but primer carbs appear to have
been retrofitted as service kits, or maybe just in-the-field by local repairers?
I don't know.
Well, primer cap conversion did not necessarily require a complete carby replacement; the new CR03501A primer cap could be retrofitted to the G4 carby, if the G4 type CR03420A 'spray tube' was used, along with the original G4 main jet. Dunno about the label.
My best view is that a 125cc with an LM must be a retrofit.
Maybe! It's actually not at all easy to distinguish between the G4 and LM carbies [at least, without pulling the main jet], as many of the parts will interchange. The major part that differs visibly is the main jet, as described in Bulletin issue M86 in the above linked thread.
