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Discussion Starter · #1 ·
For those with boats, I have a question. My boat must not like mornings very well. In the morning heading out I have to pump the primer bulb every few minutes or the motor will die out. It'll start right back up with a few pumps on the primer bulb again. This is after letting the engine warm up for 5 minutes or so before heading out. In the afternoon, heading back in, it seems to run fine and doesn't require the use of the primer bulb, other than to start up initially.

I run ethanol free fuel, from a 6 gallon tank. The fuel is new every few weeks or so. So my question is, could it be the fuel filter needs to be replaced? My motor is new last year and probably has 25 hours on it. How often do you guys change your fuel filter? Thanks for the help!!!
 

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Do you open the vent on the gas tank?
Does the motor have a "low oil" shut off?
Check for air leaks in the fuel line.
Does your motor have a diaphragm fuel pump?
My motor is 7 years old and I have never changed a fuel filter.
 

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I had the same problem. Changed out the tank and filter . It wound up being the cap vent. It's a common rookie mistake from what I've read in other forums. This is my first season with a boat too.
 

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Discussion Starter · #4 ·
Do you open the vent on the gas tank? There isn't a vent, unless it is the cap itself and needs to be loosened or opened up I guess. The tank I have is an Atwood tank.

Does the motor have a "low oil" shut off? Not that I've noticed😜. No

Check for air leaks in the fuel line. This could be a cause or problem. I really don't like the connection between the tank and the fuel line before the bulb. It's a weird quick connect type of connection, and I think I have noticed it leak fuel from this area in the past. I would almost rather run the fuel line straight into the tank and bypass the connection all together if that were possible.

Does your motor have a diaphragm fuel pump? I'm not sure what that is to be honest.
 

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Since your gas cap is not vented, next morning you go out, try this. Unscrew the cap and take it off for a few seconds then put it back on. That will allow any negative pressure built up to equalize. If that seems to resolve the issue you may want to get a gas cap that has a vent on it.

I am inclined to think it is not the fuel filter because that problem would normally remain regardless of if it is in the morning or afternoon.
 

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get a gas cap with a vent on it. then fix the line that hooking to the filter so there no gas coming out of that. That where I would start with.
 

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I would be willing to bet money that it is your quick connects on your tank line.

If you have quick connect, change that over to a straight barb. that is a fairly common problem with quick connect gas tanks and line. They tend to leak air.

I would also make sure all your fuel line connections are tight, if they leak air anywhere they will cause the symptom you are describing.

I change my fuel filter every year. For $ 1.69 for a inline fuel filter that is extremely cheap insurance.

If you try all of those approaches and with still no luck you may want to look into a electric fuel pump to feed your OEM fuel pump. just make sure you use a fuel pressure regulator because it is possible to over pressurize your oem fuel pump and blow out the seals in it and flood your carb.

What size of motor are we talking about here?
 

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Discussion Starter · #12 ·
So here's the update to this problem. As most said it was likely a venting problem. I did some more research and found that the newer Attwood gas tanks do not have a manual vent. Instead there is a hole in the underside of the gas cap. There is a small hole which contains a white colored ball. Apparently there are directions molded into the gas which describes the next process. This is only compounded by the fact that the instructions and warnings are in three different languages, but that is neither here nor there. So moving on. Take a sharp pionted object and press on the white ball until it releases. Presto problem solved. Apparently they didn't want to lose the ball during the shipping process. So in theory I should have no more problems with my gas tank not venting anymore. I'll be out Wednesday and see if that is true. Other suggestions included replacing the cap($21), drilling your own hole, or finding an older tank (prior to 2011) and using that cap. I'm keeping my fingers crossed. Anyway thanks for the suggestions!!!
 

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I agree on the electric fuel pump... I got tired of fighting mine the first few times I had it out, vented or not it didn't help and the thing was brand new. So I spent the $35 on a pump and it's actually helped performance as well...!
 
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