SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: 78centurian on April 21, 2009, 08:20:25 AM
-
first one is when i hooked up the alternator i lost power to the coil for the ignition and the boat wouldnt start....but as soon as i disconnected it it fired right up....what the hell does that mean
second one is how do you vent your gas tanks?? i have the flip style caps on mine and i was told to drill a really small hole on the inside of the cap for a vent.......what is your guys opnion of this?
third is i need a single carb plate for a fiberglass scoop.....anyone have one laying around
and lastly i need to get my 780 carb rebuilt....and one know of someone that will do it and how much?
-
and lastly i need to get my 780 carb rebuilt....and one know of someone that will do it and how much?
Here's a great carb guy, I think he's even near you.
http://fuelcurvewest.net/ (http://fuelcurvewest.net/)
-
do you mean a tray for a fiberglass scoop
-
yea i meant a tray....still a lil early and the monsters havent kicked in yet
-
you may need to jump the voltage regulater on your alternator together. depending on the alternator you got.
i dont think my gas tanks are vented. never thought about it. it runs fine though.
-
i believe its a stock alternator ouuta a 78 ford f250 camper special...pulled the motor straight for the truck and dumped it in the boat
-
oh. i know on my alt. there is a spot for a two prong plug on the top. i had to connect both those terminals together for it to work correctly.
-
yea mine dosent have that
-
How many wires to the Alt?
Ray
-
just 2
-
By two I am going to assume the main (4 guage or bigger) going to the battery and the exciter wire (About 16 guage or so).
Try disconnecting just the little wire and see what happens. Could be just an incorrect wiring scenario at your terminal block.
If you have to disconnect both to get it to run, you have a dead short somewhere, and could even be the Alt. Somewhere, seems to me, you have a crossed wire with the ignition tied to the exciter wire, really.
Just my thinking off the cuff. I'll chew on this awhile, lol
Ray
-
cool deal ill try that tonight
nobody on the scoop tray huh?
-
Lol no, never even saw one until 2sav's posts on the Carribean. My solution would be a piece of aluminum plate, a sawzall and a drill. But that's just me. Made a throttle shaft with a cordless drill, a vice, a grinder and a few files out of a nut driver back in the day, lol. (Long story, but it worked)
Ray
-
http://www.jegs.com/i/JEGS/555/55000/10002/-1
Not real sure what you are looking for but here is a tray.
Could also check Summit too ;)
-
thanx....ill have to check the size
-
I just bought my scoop tray from jegs to the tune of about $110.00. I have a 4500 series tray that came with the scoop when my friend gave it to me but the hole for the carb is too big. Ill sell it to you for cheap :-) all ud have to do is weld in a plate that makes the hole smaller if you want. Its a mounting tray for a harwood fiberglass scoop.
-
second one is how do you vent your gas tanks?? i have the flip style caps on mine and i was told to drill a really small hole on the inside of the cap for a vent.......what is your guys opnion of this?
You can buy fuel fills that already have a vent built in, that's what I did.. http://www.jetboatperformance.biz/pages/fuel_fills.html
I bought the fills on the lower part of the page, work great.
-
I just bought my scoop tray from jegs to the tune of about $110.00. I have a 4500 series tray that came with the scoop when my friend gave it to me but the hole for the carb is too big. Ill sell it to you for cheap :-) all ud have to do is weld in a plate that makes the hole smaller if you want. Its a mounting tray for a harwood fiberglass scoop.
whats the size of the tray?
-
ummm damn, i gotta measure it
-
second one is how do you vent your gas tanks?? i have the flip style caps on mine and i was told to drill a really small hole on the inside of the cap for a vent.......what is your guys opnion of this?
and lastly i need to get my 780 carb rebuilt....and one know of someone that will do it and how much?
I can do the carb, PM or call for cost.
Did you change your fuel fills, or eliminate some other venting? The tanks definately need some type of air vent, but if the boat was running they should already be vented.
-
I ALREADY AHVE THOSE FLIP TO[ FUEL FILLS...IT JUST SEEMS WHEN IT GETS REAL OUT OUTSIDE IT SPITS GAS OUT OF THE TOP OF THEM AND IT RUNS DOWN THE BOW OF THE BOAT
WHAT COULD BE THE PROBLEM? I WAS ASSUMING THERE ISNT A VENT ON THESE
-
Dunno if this helps, but the Moo boat will do that if I park it with the bow down below the transom. I have to lift it so the bow is higher, even in the garage, with full tank(s). Don't have flip tops, but sounds familiar. My fills are at the front of the fuel tanks which run clear to the transom, I figure it's just gravity, and with heat, expansion, pressure, well, you get the physics. Same thing happens with the Biesemeyer, with flip tops, but it gets stored on the side of the garage and the bow is down a little bit. I'll just never leave more than half a tank in it sitting there,I figure. Seems to be ok that way.
Ray
-
I ALREADY AHVE THOSE FLIP TO[ FUEL FILLS...IT JUST SEEMS WHEN IT GETS REAL OUT OUTSIDE IT SPITS GAS OUT OF THE TOP OF THEM AND IT RUNS DOWN THE BOW OF THE BOAT
WHAT COULD BE THE PROBLEM? I WAS ASSUMING THERE ISNT A VENT ON THESE
If you fill your tanks close to full, the heat will expand the gas and cause it to run out.
-
IF I DRILLED A LITTLE HOLE IN THEM WOULD THAT HELP?
-
IF I DRILLED A LITTLE HOLE IN THEM WOULD THAT HELP?
Do you want gas in your boat ?
-
WHAT DO YOU MEAN
-
WHAT DO YOU MEAN
Well first off , you can stop yelling.........
Now did you mean drill a hole in the tank or the cap?
-
my bad....i use caps lock for everything at work
i was thinkin of drilling a really small hole in the underside of the cap just to let the air out...
just pretty much i asking in your guys opnion whats the best thing to do
-
my bad....i use caps lock for everything at work
i was thinkin of drilling a really small hole in the underside of the cap just to let the air out...
just pretty much i asking in your guys opnion whats the best thing to do
I looked at my caps and they have a spring loaded center piece. Maybe you could find some new ones for cheap that are like that.
-
yea i have the same exact thing
-
Well I dont have any problems with fuel spilling or anything so if I was you, I would go with what I have.
-
tahts what im saying tho...i have the same exact fuel fills as you
i dont get y it would spill over on mine and no one eleses
-
Are the rubber inserts sealing correctly? I think you can adjust them with the screw in the center.
-
im not sure....never thought of that
ill have to check that tonight
can you get new inserts if the ones i have are jacked up?
or do you have to buy the whole fuel fill
-
Dont take my advice on this as a sure way to do things but maybe you could find a sheet of rubber that is about the same thickness and cut out some new seals. Just a thought anyways.
-
yea ill probably have to go mcguyver on those things
-
yea ill probably have to go mcguyver on those things
They sell rebuild kits for that , if thats the case buy one or you might make it worse ???
-
where can you pick those up at?
-
where can you pick those up at?
I seen them last year @ CP Performance , but just checked the site and didnt see em.. Maybe Tom @ jetboatperformance or just call the marine shops..CP , REX , and so on ;)
-
cool deal....illl have to check around and see what i can come up with
-
Ill look some more , they may have even been on ebay...... But they are out there...
I was going to rebuild the one's in the Bahner , but never got to it....
-
alright ill look around for them...if you come up with anything let me know
-
alright ill look around for them...if you come up with anything let me know
Give them your info so they can find you the kits.. ;)
http://www.performanceboats.com/html/forums/showthread.php?goto=newpost&t=35462
-
hell yea thanks for the help bro...i appericate it