ok had a couple of minutes last night to pull the rear needle and seat. could not find any debris in it. also shook the boat and could look down the hole and see the float moving up and down. so im figuring the float is working correctly. should i start the boat and adjust the level? should i replace the needle and seat and then adjust it? never had time to start it last night.

you can try to adjust it and see what happens..the newer fuels with the alchol in it may be doing a number on the tip of the needle..if it were me i would replace the front and the rear needle and seat's..

mr fixall are the numbers stamped on the needle valevsso i can match them up?

Pretty sure it will be a standard Holley needle and seat, that come in a "trick" kit, or rebuild kit. Most autozone, pep boys, advance, etc, stock the holley kits.

go with holley # 6-518-2

called holley and gave them the number off my carb they said use a 6-504. does that sound right? thanks.

replaced rear needle and seat and adjust now it idles great again. also replaced fwd one as precautionary. runing good again thanks for the help guys.

their is a 10cc difference in fuel rate between the 2 numbers,,the # Holley gave you is a 110 cc needle and seat and the one i gave you is 120cc,,all it does is fill the fuel bowls of the carb faster..


Glad it all worked out

Technically you would need to lower the float level to run the larger needle/seat. More area of needle exposed to the same fuel pump pressure. You need to sink the float a bit deeper to balance the increase force on the needle. Otherwise you can end up having the same issue he started with.

Just a little FYI............