Sooooo, hopefully this concept works.  Looking for a single thread where all things big jet boats can be discussed.  Who makes/made large jet boats?  What would you do for a jet pump specifically designed for a large boat (over 3500 lbs? ) Large jet boats speeds, weights  etc. for a buyers guide.  What is the biggest boat successfully running a jet?


I will start.  My 21XTSKI Lavey craft is 22' 8" LOA with swim step and is supposed to weigh 3400 lbs.  I will be getting a weight as operated soon.  Holds 50 gallons of fuel.

What did the old Spectra Cruisers weigh?  werent they 23'?

I know Hallett made a 210 in a Jet and the new Tahiti has a 22' and 24' option with a Jet. Eliminator has the 230 eagle in a Jet.  Anyone with hard data i will add in for each manufacturer.




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Size Leaders:


1.) Insert name - 23' daycruiser -

2.) 70's Eliminator 21' daycruiser - 4800 lbs? loaded -  A.T. AA impeller w/ ~500 HP,  turns  5000 rpm 57 mph loaded. 60 light load.

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try finding your color paint in the 1200 degree paint instead of the 500 degree paint

Great first boat!!!



oh and also NO WAY that is stock 330hp.    530hp is more like it.  even better for you

Fresh carb and fixed some wiring runs great now

great to hear.  didnt feel like chasing an old carb? haha

White smoke out of the carb sounds like you have too much fuel pressure and are overflowing the bowls but some of the other symptoms seem like its not getting enough fuel.

What is the fuel pressure to the carb?

I have a marine power 454 with quadrajet and the thing starts and idles like fuel injection.

Oh ok I will check and see if it?s doing that not 100% sure on how a carb works , Mechanical fuel pump about 6.5psi on fuel pressure gauge that we just installed , old carb from the part numbers I looked up it?s looks to be a really old Holley not sure on the condition of it but it does look a little dirty by the air bleeds maybe rebuild time ?

Do you have the part # handy for the carb?  You said its really old but i didnt think older carbs have sight glasses in the bowls, just inspection screws.....

did you just put this carb on the boat or is this a "new to you" boat?

Im no expert but i would say there were quite a few.  Are you talking mid 90s early 2000's year range?

i have never seen the "quick set" setup. i will have to look more into it.  Im used to spring changes.

you wont get enough load on the trailer to work the secondary's. sorry.

Impellers are usually cut so that they bite less water and thereby run at a higher RPM for a given HP rating to match the RPM power curve of engine.  If the pump has a bronze B impeller then it was most likely set up for a different motor then what is in it now (my opinion) that is making way more power.

I decent built 454 should turn an "A" impeller 4800-5100 rpm all day long. 

Example off of the impeller chart, 4800 rpm with an A impeller is 350hp, the same HP with a B impeller is 5100 rpm.

It is possible they set the rev limiter to limit the top speed of the Boat. 



Very generic answer is YES,  most likely the rev limiter should be raised.  Long answer.... only you will know your driving ability and whether or not the limiter should be raised. 

Anything new?  Turned out great!  Any info on speed or performance?

Any progress?   400 hp should be doable by getting the right cam in there.  We really need to know the head castings, as some are extremely poor on the exhaust side.  A cam in the 220/228 duration should get you close.