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Air in fuel line

Posted on 7/2/17 at 10:13 am
Posted by kennahbra
Da Bayou
Member since Apr 2016
159 posts
Posted on 7/2/17 at 10:13 am
Flat boat has been sitting about a month and fuel primer bulb will not get hard and pump fuel into fuel filter (sight glass will not fill up). Therefore motor will not start. How do i get the air out of the line so that it will build pressure and pump? 12 gallon external fuel tank with yamaha fittings.
Posted by MSWebfoot
Hernando
Member since Oct 2011
3263 posts
Posted on 7/2/17 at 10:32 am to
Sounds like there is a hole in the bulb or hose.
Posted by headedwest21
Member since Dec 2016
1108 posts
Posted on 7/2/17 at 10:38 am to
Unplug the line from the motor and stick a small screw driver or punch into the fitting on the hose. Pump the bulb and see what happens. If it shoots out then, your line is good. If it trickles out, then you getting air into somewhere and need a new hose. I had to do this last fall. I run non-ethanol fuel only but those little grey hoses don't hold up. I went to the store and got some good black hose and made one.
Posted by Geauxtiga
No man's land
Member since Jan 2008
34377 posts
Posted on 7/2/17 at 2:02 pm to
quote:

Flat boat has been sitting about a month and fuel primer bulb will not get hard and pump
Play with it a little- that usually works.
This post was edited on 7/2/17 at 2:04 pm
Posted by skidry
Member since Jul 2009
3253 posts
Posted on 7/2/17 at 6:28 pm to
Might have a clogged screen at the end of the line in the tank.
Posted by thejudge
Westlake, LA
Member since Sep 2009
14037 posts
Posted on 7/2/17 at 8:44 pm to
Buddy had this problem in his pontoon boat.

Lemme save you some trouble. Jerk everything out associated with the fuel line. Replace it all. Bulb. Line. Screen. Fittings. All of it.

Enjoy the boat!
Posted by CHEDBALLZ
South Central LA
Member since Dec 2009
21909 posts
Posted on 7/3/17 at 5:54 am to
Spend a few bucks and get a new fuel line.
Posted by diat150
Louisiana
Member since Jun 2005
43469 posts
Posted on 7/3/17 at 7:22 am to
Make your own line. The ones at walmart and shite have some kind of plastic liner that falls apart and clogs up your fuel system after a few years.
Posted by Wilson
Metairie
Member since Jul 2011
240 posts
Posted on 7/3/17 at 1:07 pm to
Order of likelihood:

1) Bulb

2) Fuel line cracked/loose at some connection that uses metal hose clamps

3) Quick connect Yamaha fuel fittings

4) Pickup tube in tank

5) Fuel line deteriorated on the inside from ethanol
This post was edited on 7/3/17 at 1:08 pm
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