Having trouble fueling your Yamaha? Me too!

[lokart]

So, I've had several stupid little things that I've had to "make right" on my Yamaha that should have been completed during the build. Lose hose clamps, rusty hardware (Yamaha should have used stainless), bolts over torqued (no anti-seize) and tons of bolts (dash board) that were never fully wrenched (washers spinning on the nuts). But this next thing beats all. I was having so much trouble fueling my boat at the pump. You know what I'm talking about... fuel, click, fuel click, fuel click. Can't even pull the pump handle half way without the dang thing clicking off, no matter the angle or depth of the fuel nozzle - took me forever to fill it up. THAT"S IT!!! I've had it. I purchased a cheap flex scope off amazon and stuck it down the fill tube. Unbelievable! I found this stupid flimsy wannabe back-flow/check valve device that supposedly keeps fuel from sloshing back up through the fill tube. Worse than it being so restrictive, I found it in the fill tube sideways. It wasn't seated squarely in the fill tube, blocking the flow. I pull the floor covering the fuel tank, removed the hose from the tank and found this device stuck sideways in the rubber tube. Instead of pulling it out and placing it where it was suppose to be seated, I removed it completely. Unlikely fuel would make it up the tube. The best part is, this little device is not listed in the parts schematic. I found it at the end of the fill tube just a few inches from the fuel tank. It looks like it is suppose to fit inside the aluminum spout that the rubber fill tube slips over.

 

[Monster77]

Thanks for the notice. Looks like a cheap little device that could have easily been made and installed better. I bought a 20 SX 195 late fall. Only had time to use it once before putting into storage. Never had to put fuel in it and still had 85% fuel left so just added fuel treatment and winterized it. If I have problems this spring fueling I’ll know where to look.

 

[Cobra Jet Steering LLC]

Similar issues with P W c fueling they put a vent at the top of the filler tube so I had to make a custom built funnel that allowed the vent to work without touching the fuel going in the tank.

 

[Sonic Blue]

Great investigation and solution. Thank you. I’m not sure I would have solved that as quickly as you did.

 

[marcham]

Great tip. I have the same fuelling problem but never considered running the borescope down the hose....

 

[lokart]

Yeah, I just had this feeling this wasn't right. Shouldn't take me ten minutes to put half a tank of fuel in the boat.

 

[lokart]

Similar issues with P W c fueling they put a vent at the top of the filler tube so I had to make a custom built funnel that allowed the vent to work without touching the fuel going in the tank.

Hmm, gonna look into that now with my FX. I was considering trying some sort of funnel adapter for the boat, but then thought I'd have a look first to if I could find an issue. Glad I did.

 

[AZMark]

Never had an issue filling mine but good to know that little bugger is in there if I ever do.

 

[212s]

No fueling issues with mine either, but if I do I know what to look for in there, thanks.

 

[212s]

had 85% fuel left so just added fuel treatment and winterized it. If I have problems this spring fueling I’ll know where to look.

Did you run the engine after adding the fuel treatment? If not, you may find it runs rough for the first few minutes as it burns off the old untreated fuel in the lines between the tank and injectors.

 

[haknslash]

Typically when addding fuel treatment for the winter you’ll want to top off the fuel tank to minimize the air gap for which water can form condensation as the temps and humidity outside change. The water can drop into the fuel which of course is not good but the stabil or other fuel additives help with that, to a degree, and even they recommend topping off the tank. You’ll likely be fine but next best to fill it up.

As for removing the check valve, whats prevents fuel from rushing out when you top it off? Is that going to mess up the functionality of the fuel vent? I probably would have just corrected the issue if possible than remove it altogether but it will be interesting to see if you have any issues as temps rise and with a full fuel tank. Keep us updated how it goes!

 

[mrcleanr6]

This is good info. Thanks for posting your findings

 

[Monster77]

Did you run the engine after adding the fuel treatment? If not, you may find it runs rough for the first few minutes as it burns off the old untreated fuel in the lines between the tank and injectors.

Yes I did, thank you for the heads up though.

 

[marcham]

Found and removed the flapper... I'll fill up next weekend and see if it is any faster.

 

[FSH 210 Sport]

Found and removed the flapper... I'll fill up next weekend and see if it is any faster.

View attachment 146698

Looks like it was installed backwards... will be interesting to see if you get any leakage without it installed since it was in there backwards.

 

[Seahorse]

Just guessing, but since cars have an auto fuel shutoff if they are rolled or tip to an extreme angle, that this check valve is the equivalent to reduce fuel leakage/spillage if the boat should overturn. That is, in addition to the mentioned reduction of fuel sloshing from the filler in rough seas (I assume the fuel cap therefore is vented and not sealed for this to be the case).

 

[marcham]

Looks like it was installed backwards... will be interesting to see if you get any leakage without it installed since it was in there backwards.

The picture is from the fuel tank side of the hose. It just really restricts fuel flow as the flap only opens partially and the spring tension is pretty high.

 

[212s]

The picture is from the fuel tank side of the hose. It just really restricts fuel flow as the flap only opens partially and the spring tension is pretty high.

Is your fuel filler cap a snug fit? If so you shouldn't have too much of an issue except maybe fueling on the water and the fuel sloshes around from waves. The tanks are vented (small chrome vent just fore of the filler) so it won't build pressure. On older boats we had, there was no flap valve so if the cap wasn't on tight, it would leak as fuel sloshed in the tanks.

 

[lokart]

The filler tube is so long, I personally can't see any way for the fuel to come back up the tube. That device is not a tight fit, so fuel can still bypass it. No rubber seals or anything. Now my boat fuels up faster than my truck. No more click, click, click at the handle. That drove me nuts!

 

[FSH 210 Sport]

Found and removed the flapper... I'll fill up next weekend and see if it is any faster.

View attachment 146698

What was the result of the flapper removal?

Helping out another member here with a similar problem.