I keep having trouble with my gas line. I have a 30 hp Yahama 2 stroke. I use pure gas, no ethanol. I’ve replaced it several times over the year. Went out today and had problems again.  When I squeezed the primer bulb, it didn’t fill up. Wouldn’t expand and let me squeeze again. I’ve bought Yamaha sets and I’ve made up my own from parts. Can’t seem to get one to last more than a year or so. Any ideas?  Thanks. 

I had better luck going to an auto parts store and buying Gas line by the foot , buying one of their primers and some hose clamps and building my own . For some reason the pre assembled ones didn’t work as well 

Yeah that’s what I did last time. That’s what I’m having trouble with now. Guess I’ll make a new one, but this one is only a couple years old. I’ve checked and all the clamps are tight. I just can’t figure out why they don’t last any longer. 

Are you storing the boat outside and uncovered?  My guess is the UV light is eating the rubber.  Or maybe it's the ozone or other chemicals in the air or rain.  They'll do a number on rubber as well, sometimes.  If so, I'd either try covering the whole boat, or at least covering that section of it.  

 

Then again, I've never had much luck with boat covers lasting more than two years or so, if they sit outside in the sun.  So you might be better off just considering this routine, yearly maintenance, as it would be cheaper than buying a new cover.  

No the boat is stored in a building all the time. After each trip I unhook the gas line from the motor and run it till it dies. Of course, the line still has gas in it but I always like to run the carburetor dry. I really don’t remember having this much trouble with the original line, but that was years ago. 

Sounds like some type of obstruction. Just spit ballin here, but maybe some crud in the tank that's getting into the line? 

Yeah maybe. I’ll take a closer look when I replace the line in a few days. Thanks. 

On 7/6/2022 at 7:02 AM, TnRiver46 said:

I had better luck going to an auto parts store and buying Gas line by the foot , buying one of their primers and some hose clamps and building my own . For some reason the pre assembled ones didn’t work as well 

 

I do the same thing.

Next time you install lines put on a fuel/water separator.  Junk in the tank might be jacking up your good fuel.

Got it fixed yesterday. The fitting on my tank was worn and out of round. Bought a new six gallon tank and connected with a barn fitting. I eliminated the disconnect there. Worked great yesterday evening. 

That’s supposed to be a barb fitting above!

You applied the KISS principle.  I do the same with the fitting on the engine also, right to the pump through a filter.