Alright here i go. can anyone tell me what PSI the stock fuel pumps are? I have a e-pump but it is a 2-5psi and was wondering what the stock pumps where at in psi? Thanks

1.8396251007362 PSI

Funny, For real can these e-pumps mess up the motors pump if not turned to the same psi? Got a new motor own the way and got one that i had own my old 25kohler didnt care if it messed up the old one but i do care about the new 35.

You should be fine with that pump. I run a Facet that's 1.5-4 psi and my carbs do not overflow. I do have twin mikuni's but I don't think a stock carb should have any trouble holding back 5 psi of fuel pressure.

I don't think it's a good idea to run two pumps. Other guys on here will be able to tell you for sure but if you are going to run an e pump, I would bypass the factory pump.

that was my next question hell dont even need the e-pump anyways really its a longtail.

Stock cam driven pump is 1-2PSI. Not sure what the vacuum pump on the CDI/Marine grade motors is, but its probably close to the cam driven one. If you feel the need to put on the other pump, bypass the stock one as mentioned above.