Berkeley 12JF-A issues
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Berkeley 12JF-A issues

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    Default Berkeley 12JF-A issues

    Hey all!..

    Just got my first Berkeley PackaJet setup, Olds 455 with a 12JF-A at the back.. was sitting for a few months ( according to old owner ) .. well just got motor re timed and running ( In the water ) .. and there is nothing pumping from Jet.. at all.. no bubbles .. no nothing.. i opened the hand hole. and checked and its clean.. what can i do to furture check this issue.. the drive shaft is spinning .. but nothing.. thanks in advance

    Mike

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    Led
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    did u put your hand over the nozzle while the boat was running and (deep enough) in the water? If you are sure, impeller issue spun the key way, or maybe little worse, take the bowl off and take a look, with a JF pump all bowl boats are probably outside the boat.

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    Quote Originally Posted by farrelmh View Post
    Hey all!..

    Just got my first Berkeley PackaJet setup, Olds 455 with a 12JF-A at the back.. was sitting for a few months ( according to old owner ) .. well just got motor re timed and running ( In the water ) .. and there is nothing pumping from Jet.. at all.. no bubbles .. no nothing.. i opened the hand hole. and checked and its clean.. what can i do to furture check this issue.. the drive shaft is spinning .. but nothing.. thanks in advance

    Mike
    Mike this could have something as simple as an "airlock" in the bowl around the impeller (although not likely on that jet ) but still possible if for example you dropped the boat in quickly with the bucket closed this should have cleared when you burped the cleanout , it also could be an obstruction in the water feed line (check to clear) , something as simple as a wasp nest or an obstruction like a baggy,debris ?? could also be any number of catastrophic internal failure , as simple as this jet is to work on I'd probably just pull the bowl Call if you have questions Tom

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    Quote Originally Posted by jetboatperformance View Post
    Mike this could have something as simple as an "airlock" in the bowl around the impeller (although not likely on that jet ) but still possible if for example you dropped the boat in quickly with the bucket closed this should have cleared when you burped the cleanout , it also could be an obstruction in the water feed line (check to clear) , something as simple as a wasp nest or an obstruction like a baggy,debris ?? could also be any number of catastrophic internal failure , as simple as this jet is to work on I'd probably just pull the bowl Call if you have questions Tom
    I pulled the Bowl off, and there was nothing inside that was stopping movement. now when i bump the motor the impeller spins.. with the bowl off. how would the water feed line stop the pump from working.. pressure? and is that the same as the water feed to the motor? or is that something completely different .
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    Quote Originally Posted by Led View Post
    did u put your hand over the nozzle while the boat was running and (deep enough) in the water? If you are sure, impeller issue spun the key way, or maybe little worse, take the bowl off and take a look, with a JF pump all bowl boats are probably outside the boat.
    I cant not spin the impeller with the bowl off.. assuming the key way was broke.. could i spin the impeller on the drive shaft?

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    Forgot to add.. I can grab onto the drive shaft and move it about a quarter inch up and down with the bowl off.. just a FYI

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    Update***

    Put the bowl back on, ran in water with nothing for a jet.. pulled boat out of water and laid under and looked into the intake gate and fired the motor for a quick second. and was able to see the impeller moving freely. and moving with the revs as it should.. soooo im lost ..

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    Quote Originally Posted by farrelmh View Post
    Update***

    Put the bowl back on, ran in water with nothing for a jet.. pulled boat out of water and laid under and looked into the intake gate and fired the motor for a quick second. and was able to see the impeller moving freely. and moving with the revs as it should.. soooo im lost ..
    Can Imagine your frustration , IF the impeller is turning and IF it (or the wear ring) is not completley destroyed and IF the feed line from the jet to the engine is clear theres really no reason to not have water supply at this point I belive I'd pu'll the impeller

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    hi mike! from the looks that impeller doesnt look very healthy. It should be pulled to check clearance to be safe. Give me a call here syracuse if i can help 315-453-1475 regards, ted

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    Quote Originally Posted by jetboatperformance View Post
    Can Imagine your frustration , IF the impeller is turning and IF it (or the wear ring) is not completley destroyed and IF the feed line from the jet to the engine is clear theres really no reason to not have water supply at this point I belive I'd pu'll the impeller
    Well I watched the Impeller spin from under the boat.. would the pickup tube make the jet not work or mess with the pressure.. Im only thinking that the purpose of that tube it to draw water to cool the engine.. or am I missing something being a rookie at this JET stuff.. I also was able to get the original service manuals from the early 70s, for ALL Berkeley pumps... from a marina I do some side work for. I will go though the manuals and over haul guide to help better help with pointing you guys in the right direction

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    Quote Originally Posted by Mr. CBM View Post
    hi mike! from the looks that impeller doesnt look very healthy. It should be pulled to check clearance to be safe. Give me a call here syracuse if i can help 315-453-1475 regards, ted
    Ted, The kid I got the boat from said that there was a new bearing installed ( somewhere in pump. ) AND that they had fixed and sharpened the impeller... from what you can see in the photo, the impeller looks rough but the Fins are filled in a polished it looks like ( not real quality job ) but it was done.. where in Syracuse are you located? shop? or just you ..

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    You've got an airlock situation like Tom mentioned. Once the pump primes it will start moving. If the impeller is turning it must be airlock. Try opening the bucket and backing the boat in a little faster than normal.
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    Just saw the pics, your clean out is outside the hull, launch the boat then open the clean out and see what's going on in there. Then close the clean out, tighten it up and try and run it. Opening the clean out could get the air out for ya.

    You cannot run the boat with the clean out open, not going to work. It must be closed.
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    Quote Originally Posted by cs19 View Post
    Just saw the pics, your clean out is outside the hull, launch the boat then open the clean out and see what's going on in there. Then close the clean out, tighten it up and try and run it. Opening the clean out could get the air out for ya.

    You cannot run the boat with the clean out open, not going to work. It must be closed.
    Ok, so ill give it a shot tonight after work, can i just blow the water feed line out with air, to make sure its clean, with the bowl on? Plus this has been sitting for a little while.. anything i should oil or grease before my first trip out ( crossing fingers )

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