Automotive carb on boat...

[Danny_Ocean]

It seems "Bubba" installed an automotive carb (Holley Double-Pumper, 750cfm) on my 454/330. Carb has what appears to be an electric choke. I know someone who has a Holley marine carb (same type/size) for sale, however that carb has a manual choke. Will the elec. choke from my old carb retrofit onto the new? Do I even need a choke here in SoFLA?<br /><br />Thanks in advance,<br /><br />D. Ocean<br />Pompano Beach, FLA

 

[rodbolt]

Re: Automotive carb on boat...

hello<br /> the holley carbs used for marine application had electric chokes. the main difference was in the fuel bowl vents. the only other difference as far as the marine was the auto motive sometimes had more vacum nipples and you will have to add the fuel pump sight tube unless you have an engine with an electric pump. dont despair quite yet.<br /> . the automotive vents went striaght up and were cut at a 45*angle the marine ones curved inward and were called J tubes so any flooding would be directed down the carb throat and not all over the intake.<br /> I have seen people make and braze on there own J tubes. we modified them all the time for drag raceing as the vents would sometimes spill fuel.<br /> good luck and keep posting<br />but look and see if your vent tubes are straight or curved

 

[mkast]

Re: Automotive carb on boat...

According to a Holley tech rep,the tolerances for the throttle shaft and the throttle base plate are closer in a marine application, less chance of a fuel leak. Yes, the auto choke and the manual choke should be a direct swap. Look at the three mounting screws around the choke housing, same pattern and size.

 

[Danny_Ocean]

Re: Automotive carb on boat...

but look and see if your vent tubes are straight or curved <br />

Definitely straight. An automotive carb.<br /><br />Thanks,<br /><br />D. Ocean<br />Pompano Beach, FLA

 

[Walt T]

Re: Automotive carb on boat...

Any vacuum ports on the carb create a hazard during backfire. Get rid of the carb. If you have a fire, someone gets hurt, and it is gas related, even if it isnt the carburetor that caused it you can bet lawyers will have a field day with you.<br />Shame on the people that encourage you to do this.

 

[rodbolt]

Re: Automotive carb on boat...

hello<br /> yep you have an automotive version. I woulkd not try to modify it nor was I encoraging you to do it. some carbs were of such a design that all the pieces were there. if it had J-tubes it has been marine approved. yours is not marine approved. other than that I wont advise you to get rid of it or run it.<br /> good luck and keep posting

 

[Danny_Ocean]

Re: Automotive carb on boat...

I know someone who has a Holley marine carb (same type/size) for sale, however that carb has a manual choke. Will the elec. choke from my old carb retrofit onto the new?<br /><br />I'm changing out the carb to the correct version. Just wanted to know if the elec. choke would adapt.<br /><br />D. Ocean<br />Pompano Beach, FLA