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Old 02-26-2013, 12:46 PM
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Ski Boat

I have a 17 foot ski boat that I have restored. It sat outside covered for 3 years due to my health issues. I have a Holley 550 double pumper. I also have a 351W in my boat and its a reverse rotation engine.I have to re due the carb and alot of other things. I have to go though all the wiring from the rev limiter to the NOS system. I can handle all of that. I just need some suggestions on the carb? When I had this boat running I have this clocked at 73 MPH. I would love to find a blower to put on it. but thats another topic..

thank you Robert
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Old 02-28-2013, 09:43 AM
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I'm not a Holley expert but I've never heard of a "550 double pumper" .....are you sure it is in fact a dp or just a dual feed carb. Also what suggestions are you looking for?
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Old 02-28-2013, 10:01 AM
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yes its a duel feed carb. I am just going from memory from what my father was telling me.. the boat ha sat for 3 years and I am sure that I have to take it apart and rebuild it.. I dont hope I did not wreck the electronic fuel fuel pump as well.. I guess that is a bridge I will have to cross as well. I am so upset about the whole thing. I would ask my father but I have not talked to him in years.. I went on Jeggs and I think that I found a kit but I would like to make sure its the right one before I spend $40.00.. What I am looking for is what to use to clean it beside carb cleaner. I have learned that acid baths really makes a mess. its been at least 15 years that I have messed with any carb. is there are any things I need to be careful of?

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Old 03-01-2013, 06:02 PM
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Originally Posted by robert66r View Post
yes its a duel feed carb. I am just going from memory from what my father was telling me.. the boat ha sat for 3 years and I am sure that I have to take it apart and rebuild it.. I dont hope I did not wreck the electronic fuel fuel pump as well.. I guess that is a bridge I will have to cross as well. I am so upset about the whole thing. I would ask my father but I have not talked to him in years.. I went on Jeggs and I think that I found a kit but I would like to make sure its the right one before I spend $40.00.. What I am looking for is what to use to clean it beside carb cleaner. I have learned that acid baths really makes a mess. its been at least 15 years that I have messed with any carb. is there are any things I need to be careful of?
Just get the rebuild kit and a can of carb cleaner. Clean everything up real good and take pictures or label stuff so you know where it all goes back.
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Old 03-01-2013, 06:40 PM
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thank you

Thank you I will give it a try.. I have a few pictures of it.. I will be able too get back into it when I am able to walk again. I know that the gas tank is empty I know that there is gas in the line and there is a electronic fuel pump. I know that I need to flush out the line is there anything that I need to do with the pump?
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Old 03-01-2013, 07:08 PM
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Thank you I will give it a try.. I have a few pictures of it.. I will be able too get back into it when I am able to walk again. I know that the gas tank is empty I know that there is gas in the line and there is a electronic fuel pump. I know that I need to flush out the line is there anything that I need to do with the pump?
Not really much you can do. Maybe just run some seafoam in the first tank of gas to clean it out.
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Old 12-18-2013, 08:27 PM
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I bought a Drag boat that had been stored inside for 5 years. Due to condensation there was nearly a quart of water in each empty fuel tank. Run the fuel pump into a bucket first to get the water out before you turn her over.
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Old 12-27-2013, 04:01 AM
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Have you run the setup you have on a Dyno? The carb you mentioned seems a bit small, but not having experience with reverse rotation and not knowing cam specs, compression, etc. its hard to say. I do know that boats are made to run wide open throttle, and in working on boat motors we always used the dyno to get everything right before going to the lake. Trying to make adjustments at the lake with the hammer down is very hard and takes the fun out.
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Old 12-28-2013, 03:02 PM
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I run a 850 Holley double pumper with mechanical secondaries on a 68 Buick 430 in my vee drive flatbottom. It has a mild cam and stock heads with Nicson log headers. It was dynoed at 400HP. This gives VERY strong torque at low end and good pull right through to top RPM. A small lag or flat spot sometimes shows up around 3000 RPM but it's not always there. I think it might be float levels but more seat time should figure that out.
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