Originally Posted by
jca2000au
I am 100% believe that your .21 come with 0.7mm head shim from factory (if it is 35Plus 21 or 359) then you need to increase to 0.9mm. In Europe they are using 0.7mm but in Asia and down here we need extra 0.2mm due to ambient temperature is higher than Europe. Also use C8 plug
For .12 is should come with 0.3mm then add other 0.2mm
It's already 0.9mm shim for .21, and 0.6mm shim for .12, and still .....
My friend also suspect imperfect batch of novarossi plugs were distributed in asia during 2005 - 2006 period. ( That's why he quit novarossi, and switch to other engines ). The last time I stock up glow plugs was in 2007, and the shop keeper told me they were 2005 - 2006 inventories.