My Honda 9hp outboaard has started aggravating me. It ran fine all summer until the end of the season and now has developed an orneriness. The symptoms are such: She'll start up fine on the second pull with choke on, but will gradually start to die out..like it's being starved of fuel.. If I throw on the choke she'll rev back up a bit. But even after warming up this continues.. so much it's hard to get into gear. Anyone recognize these symptoms?
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Hole in the fuel line
Check to make sure the fuel line does not have a hole in it and letting in to much air and not allowing the engine to draw enough fuel. the reason why it starts out fine is you forces fuel in through the bulb and the fuel is gone. I had the same issue last year, no problems since I replaced the fuel line. EJ Tews Jennifer Lea O'Day 25
Check to make sure the fuel line does not have a hole in it and letting in to much air and not allowing the engine to draw enough fuel. the reason why it starts out fine is you forces fuel in through the bulb and the fuel is gone. I had the same issue last year, no problems since I replaced the fuel line. EJ Tews Jennifer Lea O'Day 25
Other ideas...
Basically, what you are running into is that it starts fine and after a bit of running it's starved for gas. The reasons for this can be many. Check to make sure your tank air vent is open (Had that happen myself!). The vacuum in the tank wont allow any fuel to be sucked into the engine. Second, check to see if the lines or filter are clogged. The engine is drawing in the gas from the area past the clog and runs fine. When this gas is gone, it can't suck past the stoppage (happened to me on a cycle). Air leak as Tews states, this would cause the fuel to flow back to the tank instead of staying in the line after you pumped it, again starving the engine. Easiest way to tell is to remove the lines and tank completely from the picture and try running it with someone else's tank if you have a friend that can loan you one. Make sure you get ALL the line, including the peices connected to the fuel filter. If you cant find a tank to borrow, you can get a windshield washer or collant overflow bottle and fashion that with some fuel line to be a 'minitank'. Run the engine with just that and see if it does the same thing. If not, then you know the problem is either with the lines or the tank. If this doesn't solve the problem, let me know, I can probably help you out. Old hat to engines, new to sailing!
Personally, in replacing lines, I use a clear braided fuel line. It allows me to see the fuel flowing, or if it's not, and is easier to diagnose problems such as clogs. Josh
Basically, what you are running into is that it starts fine and after a bit of running it's starved for gas. The reasons for this can be many. Check to make sure your tank air vent is open (Had that happen myself!). The vacuum in the tank wont allow any fuel to be sucked into the engine. Second, check to see if the lines or filter are clogged. The engine is drawing in the gas from the area past the clog and runs fine. When this gas is gone, it can't suck past the stoppage (happened to me on a cycle). Air leak as Tews states, this would cause the fuel to flow back to the tank instead of staying in the line after you pumped it, again starving the engine. Easiest way to tell is to remove the lines and tank completely from the picture and try running it with someone else's tank if you have a friend that can loan you one. Make sure you get ALL the line, including the peices connected to the fuel filter. If you cant find a tank to borrow, you can get a windshield washer or collant overflow bottle and fashion that with some fuel line to be a 'minitank'. Run the engine with just that and see if it does the same thing. If not, then you know the problem is either with the lines or the tank. If this doesn't solve the problem, let me know, I can probably help you out. Old hat to engines, new to sailing!
Personally, in replacing lines, I use a clear braided fuel line. It allows me to see the fuel flowing, or if it's not, and is easier to diagnose problems such as clogs. JoshI had the same problem with my 9.9 Yamaha
In my case it turned out to be a gummed up carb. I dont use much fuel and apparently as the season went on the fule got stale. The Yamaha tech told me to ALWAYS use gasoline stabilizer to avoid this.
In my case it turned out to be a gummed up carb. I dont use much fuel and apparently as the season went on the fule got stale. The Yamaha tech told me to ALWAYS use gasoline stabilizer to avoid this.
Answers to your questions...
There ARE additives, but if the problem continues you'd have to take it a part and clean it all up. You can check your local automotive supply store for the additives. Something like Gumout (removing the gummy builtup gas is how it got its name right?) or the like should work if the carbs aren't too dirty. Line can be purchased at the hardware store or the automotive shop. They have the bulbs as well sometimes. Any large outdoor chain store like Gander Mountain or Cabellas should have these both and the fitting you need. If they don't, you can try a marine store but expect to pay a bit more. If THEY don't have it, contact your nearest Yamaha dealer. A cycle shop should be able to order the outboard equipment as well, but again you will pay a good deal more then you would at a hardware store! Josh
There ARE additives, but if the problem continues you'd have to take it a part and clean it all up. You can check your local automotive supply store for the additives. Something like Gumout (removing the gummy builtup gas is how it got its name right?) or the like should work if the carbs aren't too dirty. Line can be purchased at the hardware store or the automotive shop. They have the bulbs as well sometimes. Any large outdoor chain store like Gander Mountain or Cabellas should have these both and the fitting you need. If they don't, you can try a marine store but expect to pay a bit more. If THEY don't have it, contact your nearest Yamaha dealer. A cycle shop should be able to order the outboard equipment as well, but again you will pay a good deal more then you would at a hardware store! Josh
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