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Thanks for all your feedback. I had a chance to get back after the machine and found that the previous owner had adjusted the valves incorrectly. The Intake valves were adjusted with zero lash, in fact one side may not have been closing at all. After the valves were adjusted properly, the...

thanks again for your investigation and reporting. The jets I purchased were for a 24hp B&S engine and are very similar to those you report. My 27hp Generac isn't happy with these, just a bit lean. I think I will carefully open them up to obtain the performance this engine is capable of.

Thanks for your reply. I've attached an image of the id numbers.

Hi, thanks for your reply. Yes, I've tried parts tree, they have "rebuild kits" etc, but no jets, at least for a Nikki on a Generac. I have found people selling these o-rings on ebay. Yes, there are differences in jet size, my understanding is due to intake runner length. The float bowl is...

I bought a Dixie Chopper with Generac 27hp knowing there was a fuel supply issue. Engine ran fine at idle but ran rich as rpm's increased. Verified choke and air filter were fine. Presumed the Nikki dropped a main jet or two. When I opened it up, in fact the main jets were not in place, nor...