Honda P50 owners I could use some help

Mark Booth /
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I have finally had the time to finish up my Honda P50 project. I have done a lot of work to this one to get it to where it is at. From having custom o-rings made for the carb, making repairs the the wiring so that everything works to doing a top end overhaul.

It starts and runs well at idle and but once I run it up in speed it starts to misfire and sputter. If I open up the Air Screw, from the stock setting, it gets better but then I lose the bottom end and it starts to misfire. It will actually stall and die trying to get it going.

I have an original service manual and have put all the carb settings to the factory specs. I have cleaned and cleared out all of the passages in the carb.

Here is my question... The service manual says my main jet should be a #55 there is a #62 in place. I have another carb (the newer style) and it too has a #62. So I have to ask if anyone out there is running a P50 and knows what the main jet size is in yours.

The plug looks a little dark so it looks like it is running rich. I can purchase the #55 main jet but it is overseas and costs a small fortune to get it mailed here. Just want to verify if I have the right jet and the carb has issues or I have the wrong jet and need to get the right one.

Thanks for any help.

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