SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: SuperDuty on March 04, 2010, 08:30:12 AM

Title: Holley 750 DP
Post by: SuperDuty on March 04, 2010, 08:30:12 AM: Hey, Found a good deal on a Holley 750 double pumper that needs a rebuild. Would this carb be fine for my stock 454?
Title: Re: Holley 750 DP
Post by: CHROMEY on March 04, 2010, 08:39:56 AM: SHOULD BE PERFECT!
Title: Re: Holley 750 DP
Post by: SuperDuty on March 04, 2010, 09:11:57 AM: Guy just emailed me back.. Its a vac secondary.. Iv heard to stay away from these on boats. That true? The carb looks great and needs a rebuild for 50 bucks.. Kinda seems like I cant go wrong.
Title: Re: Holley 750 DP
Post by: OC2Vegas on March 04, 2010, 09:15:13 AM: its been said that an engine in a jet boat doesnt make enough vac to open it fully. Stick to what has been proven to work over and over, mech secondaries.

Brad's got an Holley 850 w/ Mech seconds for sale at a good price. Thats your best bet!

http://www.socaljetboats.com/random-boat-parts/scoops-carb-ta's-and-intake/ (http://www.socaljetboats.com/random-boat-parts/scoops-carb-ta's-and-intake/)
Title: Re: Holley 750 DP
Post by: GT Jets on March 04, 2010, 11:22:01 AM: Quote from: OC2Vegas on March 04, 2010, 09:15:13 AM
its been said that an engine in a jet boat doesnt make enough vac to open it fully. Stick to what has been proven to work over and over, mech secondaries.

Brad's got an Holley 850 w/ Mech seconds for sale at a good price. Thats your best bet!

http://www.socaljetboats.com/random-boat-parts/scoops-carb-ta's-and-intake/ (http://www.socaljetboats.com/random-boat-parts/scoops-carb-ta's-and-intake/)

X2, you could get it to work, but I think you will be much happier with the mechanical secondary deal. :thumbup:

GT
Title: Re: Holley 750 DP
Post by: SuperDuty on March 04, 2010, 11:47:19 AM: Talked me into it. Just sent payment to Brad. Now for intake.. Found a local guy selling a torquer 2 for 40 bucks for my oval heads. Opinions on the intake?
Title: Re: Holley 750 DP
Post by: GT Jets on March 04, 2010, 11:49:29 AM: Quote from: SuperDuty on March 04, 2010, 11:47:19 AM
Talked me into it. Just sent payment to Brad. Now for intake.. Found a local guy selling a torquer 2 for 40 bucks for my oval heads. Opinions on the intake?

Shopaholic ;D

$40 sounds pretty cheap for a Torker 2, I am wondering if it is cracked or warped, good manifold IMHO though...

GT
Title: Re: Holley 750 DP
Post by: SuperDuty on March 05, 2010, 09:31:04 AM: I picked it up. Took a straight edge with me and it was square to the eye (and ruler). The only issue is that it had a burr where the therm. housing bolts up. Guy said they just ran a little extra RTV there. Couldnt pass it up for 40 bucks. Nothing else its a tire chaulk!
Title: Re: Holley 750 DP
Post by: crewchief22 on March 06, 2010, 07:27:03 AM: JB weld works wonders
Title: Re: Holley 750 DP
Post by: Nordie on March 06, 2010, 08:43:38 AM: SD you doing really good on the budget shopping way to go...i hope everything works out for ya :thumbup:

just take your time putting everything together, and inspect everything carefully ;)
Title: Re: Holley 750 DP
Post by: funnynitts on March 30, 2010, 12:28:56 PM: Hey guys, I'm new to the jet boats and until a few days ago i didn't even know there were marine carbs, lol. Anyway i have a Holly DP that needs rebuilt. I'm wondering if there is a difference in the rebuild kits between a Auto and marine carb? Any information is greatly appreciated.
Title: Re: Holley 750 DP
Post by: beerjet on March 30, 2010, 04:20:22 PM: Open or enclosed engine compartment.
Mine is closed and I have an automotive carb, so who really cares.

-beerjet-
Title: Re: Holley 750 DP
Post by: obnoxious001 on March 31, 2010, 02:23:26 AM: Quote from: funnynitts on March 30, 2010, 12:28:56 PM
Hey guys, I'm new to the jet boats and until a few days ago i didn't even know there were marine carbs, lol. Anyway i have a Holly DP that needs rebuilt. I'm wondering if there is a difference in the rebuild kits between a Auto and marine carb? Any information is greatly appreciated.

It will use the same kit. A Holley "marine" carburetor has a little different metering to handle the load of a boat, and then of course the visibly obvious "J" tubes for the vents that are used to keep sloshing fuel from being spit straight up, presumably to help prevent a fire in the boat.