300/440/550 FIXED!! If you're having problems, check the fuel lines

ger87410

How did I get here?
Location
Fort Worth
'87 js550. Stock bn44 carb, I think.

She's acting like the main jet's plugged. Doesn't rev up unless I play with the primer.

She didn't start acting like this until I was playing with waves and the main fuel line fell off. I then used the primer to get most of the way back.

Where's the jets on these carbs?
 
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SuperJETT

So long and thanks for all the fish
Location
none
They don't have replaceable jets, it's just screws basically. There is a hole that could be drilled out for more fuel, but no jet per se.
 

ger87410

How did I get here?
Location
Fort Worth
Nevermind. Found it!

Every thing's (pretty much) tucked under the fuel pump.

Still, I didn't see any dirt or crud. The diaphragm was not torn.

I'll know if I'm zeroed in on the problem tonight...
 

jetboy1004

Shootin Brapaholics
Try replacing the Primer. They are known to go bad and will let air in and cause the problem you are describing. It's 20 bucks that could save you alot of headache.
 

ger87410

How did I get here?
Location
Fort Worth
It's definitely not the primer.

I've given up on that carb. I'm going to try sticking Wayne's sbn44 carb on it and see how she does.

I've put the needle settings back to stock, with worse results. I guess I just don't know how to tune this carb... :shrug:
 
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