Thread:

Carb Problems (need some help)

Originally Posted by dremmick

I'm located in Fargo north Dakota. The floats are brass the carb was rebuilt using a genuine Holley rebuild kit. I thoroughly cleaned Everthing with carb cleaner. The fuel is rubber so I will have to try the test you mentioned.

Last year I keep haveing problems with my carb, spent hours and hours trying to fix, then I sent them to C&J. My boat never ran so good, not cheap but I think it was worth it good luck

Originally Posted by dremmick

I have a jet boat with a chevy 454 big block and a holley double pumper 750cfm carb. The boat used to start but would load up with fuel and just bog. I rebuilt the carbs (first time rebuilding a holley) and some how managed to make things worse. I crank over the engine it pops right away then just continues cranking. I pull the plugs and they are soaked. I take plugs out and let them dry and install them again after a couple of seconds of cranking there soaked again. Is there a way to check fuel pressure on an engine that wont fire?

How old is the fuel line? is it the alky type?

Originally Posted by Moneypit

That's a little confusing... Oh, do you mean fuel LINE is rubber....OK, you're close to "No Man's land" there in ND, but there might be someone in your area... Tell you what, haul it down here to the river and I'll be glad to give you a hand...... You may know this, but if you invert the bowl, bottom up top, and set the float "top side" parallel to the top of the bowl, now on the bottom, you're done with float settings. A tiny piece of "sheared" rubber in the needle is easy to get if any of the hose barb fittings have sharp edges.. I've lost track of where this thread has gone, I'll review it later and see if I can add anything constructive....
Ray
PS Here at the river we're suffering from an early April heatwave. Mid to upper 80s, with a couple of days into the low 90s. Cooling this weekend to mid 70s Saturday, and mid 80s on Sunday....So....C'mon down, we'll get those carbs dialed right in!!!

I did adjust the float as you mentioned (this was always specified in the rebuild kit instruction) and still hand no luck after a couple cranks plugs are soaked.

I am not sure how old the fuel line is since i bought the boat last year.

Did you pull the plugs on fuel bowls to check level?? Is level too high/fuel dripping out vent tubes or boosters?? IF not could be many things, bad/old fuel (you said it wasn't running right before you rebuilt carb). Bad spark or timing (you say it pops once and then won't fire up). Got to find out where the excess fuel is coming from or if it is some other problem. Just trying to help you out.

i had the same thing make sure your gaskets are corect mine were wrong but looked the same and it did the same thing mine was on the meterining plate

Bite the bullet and go see Johnny at C & J Engineering it will be the best money you`ll ever spend! My Dad and I have been going there for years and no complaints. The best thing is when you just let the fuel pump fill the carbs and hit the key she`ll come to live without pumping the pedal or holding the gas after she fires or adjusting anything after it idles on its own...
Johnny is the best and is very willing to help and explain how all this stuff works for all of us retards out there that like to go fast!

Wow i appreciate all the feedback!! Sorry im not so smart when it comes to carbs. I do have the carb with the idle mixture screws on the Primary/front side of the carb. The engine has not backfired since i rebuilt it and i did not match up the metering valve gaskets. There is no valve on the fuel pump but will have to put one on. Looks like i got a big list of things to try already! the boat is at the lake and i will not be there for a few weeks. But i will let you guys know how i make out.

where is C&J located ?
is this place on Imperial hwy?
thanks