carb jetting on a hp 500
#2
Re: carb jetting on a hp 500
I had a stock HP500 carb in my 2000 29 Fountain when I owned it. I kept it stock except for advancing the timing to 36 degree. This gave better acelleration. I was playing around with putting in a spacer but did not want to go through with having to re-do the fuel lines. The engine ran a little rich and I was told I could lean it out some but it's better to run a little rich than lean.Maybe jet down 1 size would have done the trick. Also I wanted to put CMI or Stainless Marine exhaust manifolds on because those Gil's are horrible. I'm no engine guru so hopefully others that know way more will reply to you.
#3
Re: carb jetting on a hp 500
Originally Posted by FeverMike
I had a stock HP500 carb in my 2000 29 Fountain when I owned it. I kept it stock except for advancing the timing to 36 degree. This gave better acelleration. I was playing around with putting in a spacer but did not want to go through with having to re-do the fuel lines. The engine ran a little rich and I was told I could lean it out some but it's better to run a little rich than lean.Maybe jet down 1 size would have done the trick. Also I wanted to put CMI or Stainless Marine exhaust manifolds on because those Gil's are horrible. I'm no engine guru so hopefully others that know way more will reply to you.
#4
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Re: carb jetting on a hp 500
Remove air cleaner and you will see 8 small air ports on top of the carb. Shoot some carb cleaner into these air ports & shoot out with a little compressed air. My motor guy calls this a case of the "Fuzzies". (I use a key board compressed air bottle) The other thing I would check is the timing on that motor, make sure its good an warm. I have my Stroked 500HPs at 34 Degress and time at 3500 RPM. I do not know where stock 500HPs are supposed to be??? Hope this helps