carb/idle help

[cjtpilot]

I have read through the earlier posts about carb adjustment and followed everything to a T. Here is my situation, 351 PCM with Holley 4160, 1.23:1 Trans, protec ignition, new choke set at 2 lines rich from stock, new fuel pump, mixture screws 1.5 turns. Starts and warms up fine, idles fine when put onto gear for a little while. Idle is set @ 800RPM however pretty sure my tach is off sounds lower than that. Anyway as the engine continues to run when I put into gear it stalls out. If I want to keep it running I have to bump the throttle which when picking up skier or docking is NOT fun.

[cjtpilot]

I noticed as soon as the Primary valve is opened when throttle is advanced thats when it stalls out.

[CJD]

Try opening the idle mixture screws about 1/4 turn each to see if that helps. When I had carbs, I would set my idle mixtures with the boat idling in gear. With the extra load it takes a bit richer mixture than a no-load idle.

[cjtpilot]

I will try that.

[Hagman]

1.5 turns is a good place to start but every carb is going to be a litttle different. You shuold be able to lower the idle down to 600 rpm in gear. Sometimes the PCV valve is not working right. They are only about 5 bucks. I chased an idle issue for 2 summers. It was a faulty PCV. Good Luck!

[cjtpilot]

With the idle adjustment all the way out the tach read 800RPM, thats why I think it is off because it sounded like a good idle.

[cjtpilot]

I will definitely check the PCV valve tonight when I get home.

[92SupraComp]

1.5 turns usually is too lean. The base starting point for almost all carbs is 2.5 turns out... Check your one vacuum line and check some of the blanked off ports on the carb as well. Maybe check your timing also.

[Jetlink]

No timing with protec ignition I thought.

[CornRickey]

Stalls on accelerating usually means a failing accelerator pump.