Fuel line blues

[John Dodge]

I Am A Newbe and recently bought a 84 Hunter 31. I moved the boat Friday from Frog mortor creek to Rock Creek. We had motored for about an hour after the fog lifted we began to get Good wind and sailed most of the way. We were moving pretty well and stirred things up a bit. I decided to motor once we got to rock creek. Motored for about 15 mins. when the engine RPM's slow to a halt. I had plenty of fuel but I noticed there is a squeeze bulb in the fuel line and this was flat as a pancake. I opened the glass fuel filter and drained same also did same with a filter on the engine. the squeeze bulb was now open or full again I gave it a few pumps and filled the Glass filter I then opened a screw on top of the on engine filter and squeezed the bulb again and got fuel out of that. She cranks over with plenty of guesto but will not start. Might I have air in the line? How do you check for an air lock? God only knows how old the fuel is. I was going to drain the tank once I got it into my slip. Fuel line blues.

 

[Howard]

Cloged tank vent

Sounds like a air in the line to me. The squeeze bulb probably got collapsed because the tank vent is clogged. THe vent is usually a small clam fitting (stainless or plastic usually on the transom or side near the transom of the boat. The vents usually have a small screen in them to keep critters out. Check to see if it's clogges. Inside the boat check to see that the the rubber line (fuel line) isn kinked. When the fuel is used you need to allow aire to take the place of the fuel. IF you don't you form a vacuum and the engine stalls. Follow the yanmar instrustrucions to hbleed the fuel system. I think they are on the site.A second problem might be a clogged filter. If the builb is between the tank and the filter the problem is probably the vent. IF the bulb is after the filter the prioblem is probably a clogged filter. The bulb is usually between the tank and the filter.In an emergency you can open the fuel fill cap but NEVER in windy or rough conditions. You don't want to get water in the tank. IF you do the water sinks to the bottom of the tank and the engine sucks up the water. A little H20 might be taken care of by a water seperator filter. but I wouldn't want to try it out.Hope this helps,H

 

[Lawrence]

agree with Howard

I agree with Howard,sometimes spider webs in vent..however don't forget algae if fuels old. I had that problem this year, i'am atParkside marina on frog mortor-35.5 remembrance