smokey 100series

G'day Ando

I probably can't really answer your question correctly, but I think it is more likely that the engine is tuned for emissions. I gather that in Japan there is more emphasis on NOx (oxides of nitrogen) rather than particulates (black smoke). There is a bit of a balancing act to be performed...one compromises the other. Timing and pump settings may both be involved to achieve their desired outcome.

I know that one of our customers has 2 x 1HZ engines, and he tells me that one has always been cleaner running than the other, so there may be something in what you say.

Regards
Brid