Repairs and Maintenance > Engine Repair/Maintenance - All Ski Boats

carburetor size

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jason:
I have a 1985 advance with a 350 Chevy pleasure craft . I would like to know what carburetor was on this motor from the factory. I believe it was a holly 4160, but after looking at the pleasure craft service manual there seems to be 5 different models of the 4160. Any input  about the carburetor would be great .Thanks

Midskier:
yes 4160
good it was a 4160 600cfm vacuum secondaries
electric choke
is your carb missing, been replaced, why are you asking?

need more info call me

Dan T

jason:
Hey Dan, thanks for you reply . The carb has been replaced and rebuilt and always seems to run rich even when you adjust the mixture and has been running rough ever since. The reason i ask is , the 5 carbs pleasure craft lists  are all 4160s but all have different jet sizes.

backfoot100:
Jason,
As long as it's a 600CFM 4160 it should be fine. It is a marine version correct and not automotive?

These carbs are generally bolt on and go. The jets are actually pretty good from the factory as long as you have the right CFM on the right size engine. Just making some minor mixture, idle, accelerator pump and choke settings should get you where you need to be.
How are you determining it's running rich? Is it the factory intake or has that been changed? Have you made sure there are no vacuum leaks? If the carb was rebuilt, has anything been changed in it like the power valve or jets? When was a good tune up done on the engine (plugs, points, condenser, cap, rotor, timing)?
I don't mean to sound elementary, but rough running could be something other than the carb too.
Dan is definitely one to talk to. He can help you out.

Mike Harry:
One reason I dont like the Holley personally, if you get a pretty good sneeze (backfire through the carb) the power valve will blow out of them.

Ive seen it happen many many times. Now you usually only see this when a motor is out of time but it happens.

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