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Post by Deleted on Jan 15, 2015 9:09:54 GMT -6
Where is the fuel vent located on 2004 2100sv bay boat? I have looked all over and can't seem to find a location for it. I just bought the boat a few months ago. I have a 150 optimax and it just started to give me issues as if it is starving for gas. It will run great at first and after a few miles it will stall out. It will continue to do this but more frequently until the motor just won't run for more than a minute or less and stall out. I have changed the fuel/water separator on the engine (boat doesn't have separate one yet), new spark plugs and battery (needed to be changed). During my research, I am going down the list and fuel vent is the next thing I want to check since other people have had this problem. I smell some fumes when I was looking around inside the boat but not overpowering. I use ethanol free gas. The only thing that's been run through the boat. From what I've read is this model sea pro went away with the external filter that hangs off the side but I am not completely sure on this. Hope someone can help me out.
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Post by Juan on Jan 15, 2015 12:59:20 GMT -6
It's vented inside the fill tube and there is no external vent... have you checked or replaced your fuel bulb?
Welcome aboard.
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Post by bluegater on Jan 15, 2015 14:35:22 GMT -6
You might also check, replace or remove the check valve in the tank pickup. The fuel tank check valve is redundant with the check valve functionality in the bulb. There is also an engine mounted fuel filter on the 150 optimax that you could check. Each one of these devices (check valves, filters, etc.) cause some flow restriction, sometimes to the point the motor starves for fuel.
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Post by Deleted on Jan 15, 2015 16:54:14 GMT -6
I have replaced the fuel filter and fuel bulb already. Juan I love your set up on your 2100! So where is the fill tube located? How are the fumes vented? Should you smell fumes inside boat? My last thing would be to change the fuel pump but I'm trying to work from least expensive to most expensive
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Post by Deleted on Jan 15, 2015 16:55:37 GMT -6
Blue gator the check valve was next on my list as well
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Post by Juan on Jan 15, 2015 18:47:58 GMT -6
Thanks cgraz1.. maybe I should have said fuel fill line instead of fill tube. You should be able to see one end of the vent line on top of your fuel tank if you look in the access port located behind the seat and just in front of your livewell. Here's an old thread that may or may not be of some help: link |
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Post by Deleted on Jan 15, 2015 21:31:13 GMT -6
So I have a stainless steel cap on my boat that tightens down and won't allow anything to vent. So looked at that picture that you posted, the vent is inside that cap? If so, how is the fume supposed to ventilate?
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Post by Deleted on Jan 16, 2015 2:39:40 GMT -6
Juan is your fuel cap ventilated? My cap is a threaded stainless steel cap with no vent
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Post by freezerfiller on Jan 16, 2015 7:18:24 GMT -6
The fuel tank check valve is redundant with the check valve functionality in the bulb. Not exactly.. The check valve at the tank is an antisiphon valve. It's spring loaded to prevent fuel from siphoning out of the tank by gravity alone, but will break the seal when it is assisted with a fuel bulb or fuel pump. Bluegater is right that it is a likely source of the problem you describe, as they commonly get stuck with age. I used to have problems with mine all the time until I threw it as far as I could into the Gulf of Mexico. It works much better now! The easiest way to determine if it's your fuel vent is to take off the fuel cap next time it happens. You should hear air rush in, or if the problem goes away, it's your fuel vent. If it doesn't it's either your check valve, air leak in fuel line (could also explain gas smell), clogged fuel filter/pickup tube strainer, or a bad fuel pump. If your fuel tank vent does go to the fill tube, you should have a vented cap. otherwise, it usually vents out the side near the gas cap. |
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Post by Juan on Jan 16, 2015 8:11:05 GMT -6
So I have a stainless steel cap on my boat that tightens down and won't allow anything to vent. So looked at that picture that you posted, the vent is inside that cap? If so, how is the fume supposed to ventilate? Yep, the vent is under the stainless steel cap.. don't ask me how it vents...I don't know and can only assume that it only needs to vent when the cap is off and adding fuel. Here's a pic of mine...  |
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Post by Deleted on Jan 16, 2015 8:24:34 GMT -6
 Yeah I have no idea how it vents either Juan. Freezer filler all those things are on my list. I will hopefully get some time to work on it this weekend. My biggest issue is figuring out how it vents out of the boat. I don't have an external vent like the previous models have.  |
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Post by Deleted on Jan 16, 2015 16:10:34 GMT -6
"Those are simple fixes but possibly hard to check. Hate having to work in the bilge on these boats."
No joke southern cross it is a pain the butt working inside these boats. The previous owner only used ethanol free gas which I trust him because he was honest about other stuff on the boat. That's all I run through it. Engine just started giving me trouble. Previously ran fine at least 10 trips prior. The motor is a 2005 and only has 190 hours on it and no prior major work done it. I will figure this out and the one positive to all this is I know my motor and boat a lot better
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Post by fmiddleton3 on Oct 5, 2015 10:27:05 GMT -6
I am new to this forum. I have a 2005 Sea Pro 2100. I think the fuel vent must be blocked. It takes forever to put fuel in the tank and it spits it out if the rate is increased beyond a very slow rate. Where is the vent? Is there a way to clean the vent?
Thanks. fm
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Post by Juan on Oct 5, 2015 16:35:51 GMT -6
The vent is under the gas cap.. see the picture above. If the vent line is blocked, you could try blowing air into the vent hole under the gas cap but either use very little pressure, or remove the vent line from your fuel tank first or you could blow the fuel gauge sending unit seal and have more problems.
There have also been cases where the fuel line was crimped when the manufacturer placed the cap on the boat's hull causing the fuel fill issues you describe. Not sure how to fix that.
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Post by freezerfiller on Oct 6, 2015 8:12:39 GMT -6
Look down your fuel fill and check for any obstructions, or if your fuel fill is slightly kinked, or maybe clamped on crooked (use a flashlight, not a lighter  ) with the gas cap off, you can blow some air into the vent hole, and you should be able to feel it come back out the open fuel fill area you should be able to tell if it's blocked. There should be no issue with blowing the sending gasket as long as the fuel cap is off. If you don't have access to a compressor, you can run some plastic icemaker water tubing through the vent hose to check if it's kinked or blocked. |
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Post by Juan on Oct 6, 2015 15:13:29 GMT -6
There should be no issue with blowing the sending gasket as long as the fuel cap is off. Correctamundo and thanks for pointing that out Mr. Freeze. emthup I realized what I had posted and logged on to edit my post but you beat me to it.. blow some air into it, and don't worry about the gasket since the air should exit the fill line.. I guess I was thinking about an external vent. 021 |
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Post by stripersniper on Dec 1, 2015 18:07:24 GMT -6
Old topic but my p4 sv19 has a piece that sticks out rite beside the of in seapro on the side. I assumed it's a vent. I was filling it up once and I guess it was full and gas shot out of it. The nipple broke off from age I guess and now it's just a hole. I worry about water getting in but it was open with nipped on it so guess it's no biggie.
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Post by Juan on Dec 2, 2015 7:29:02 GMT -6
Old topic but my p4 sv19 has a piece that sticks out rite beside the of in seapro on the side. I assumed it's a vent. I was filling it up once and I guess it was full and gas shot out of it. The nipple broke off from age I guess and now it's just a hole. I worry about water getting in but it was open with nipped on it so guess it's no biggie. Yep, that is the vent and you might want to replace it because you're right...water can and will get into your fuel cell from there.. Someone else had that problem and replaced the broken one... I think it was Runninlate... you should find the thread topic if you do a search. |
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Post by freezerfiller on Dec 2, 2015 10:34:59 GMT -6
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Post by gtightline on Dec 2, 2015 11:09:33 GMT -6
Mine has broken off a couple of times while at the dock. Doesn't take much to break that plastic right off..it is a poor design, that's for sure. Someone here on this forum suggested using a clam shell to protect the existing plastic vent. They also have one that is flush with the hull, but it states that it is NOT truly capable of keeping the water out....This vent sticking out of the side of the hull is the one thing that sucks about my Sea-Pro. It's actually the only thing that I feel they could have done a better job on, Well... that and battery location...BTW Freezerfiller, that is the same vent I have.
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) with the gas cap off, you can blow some air into the vent hole, and you should be able to feel it come back out the open fuel fill area you should be able to tell if it's blocked. There should be no issue with blowing the sending gasket as long as the fuel cap is off. If you don't have access to a compressor, you can run some plastic icemaker water tubing through the vent hose to check if it's kinked or blocked. 
