loco
Petty Officer 2nd Class
- Joined
- Apr 25, 2010
- Messages
- 154
Hi all!
So my accellerator pump was shot, so I spoke to real steel in the UK, who found a compatible rebuild kit for my carb (Holley 75007-2).
The carb's obviously a marine model, and the rebuild kit was for a car. Everything went in OK, but the power valve that came out of the carb was unmarked. The power valve that came with the rebuild kit was a 6.5, and felt like it had a lot more resistance to the one that came out.
I just bolted the rebuilt carb on last night, and got it fired up. I fiddled about with the idle screws a bit to get it idling a bit better, and was getting around 12-13in/Hg at idle. That said, the idle is still lumpy, so I think there is more work to be done getting it right, but it was dark and raining, so I left it last night.
Anyway, my question is: do I need a lighter power valve for marine use? Does anyone know what these carbs would have had in them from stock?
I'm obviously looking for the best performance, and hopefully some efficiency. My fuel flow meter goes up to 65litres/hour when I have WOT, and it's only a 23ft boat, pushing 220HP!
Thanks in advance.
So my accellerator pump was shot, so I spoke to real steel in the UK, who found a compatible rebuild kit for my carb (Holley 75007-2).
The carb's obviously a marine model, and the rebuild kit was for a car. Everything went in OK, but the power valve that came out of the carb was unmarked. The power valve that came with the rebuild kit was a 6.5, and felt like it had a lot more resistance to the one that came out.
I just bolted the rebuilt carb on last night, and got it fired up. I fiddled about with the idle screws a bit to get it idling a bit better, and was getting around 12-13in/Hg at idle. That said, the idle is still lumpy, so I think there is more work to be done getting it right, but it was dark and raining, so I left it last night.
Anyway, my question is: do I need a lighter power valve for marine use? Does anyone know what these carbs would have had in them from stock?
I'm obviously looking for the best performance, and hopefully some efficiency. My fuel flow meter goes up to 65litres/hour when I have WOT, and it's only a 23ft boat, pushing 220HP!
Thanks in advance.