Gasket for gas

[iggyw1]

I need to replace the gasket on my portable 6 gallon gas tank for my Evinrude motor. What kind of gasket material would I need to buy to make the gasket myself? I live realy far from an Evenrude OMC dealer and Home Depot is one block away from me, so I want to get the material and make a gasket for that reason. Don't know if cork is what I need, rubber or fabric?? it is for the gasket that goes under the top connection on the OMC tank that houses the gas gage and the hose connector. It is about a 3" X 4" piece of metal with the gasket beneath is, and the gasket is leaking and broken.

 

[boobie]

As the original was cork that would probably be best.

 

[iggyw1]

As the original was cork that would probably be best.

Thank you. The one that is on there now is rubber, but it looks like it stretches pretty bad. I tried to tighten the 4 screws on the thing, and this rubber gasket squeezed out from beneath the connector. I tried to repair that with some form-a-gasket to no avail, but I credit that to me using it immediately after I put it back together. Thanks for your input. Looks like the one iboats sells on line is cork too, but I would still like to make one so it will be repaired tomorrow.

 

[RCO]

Might as well order the o-rings and core plugs for the sender also. Usually they are shot at this age and will cause a leak when the tank builds up pressure when it gets hot. It will save you having to pull it apart again later.

 

[David Young]

This is what I did to fix my leaking metal gas tank. Well worth the $40 the parts cost http://forums.iboats.com/forum/engi...ude-outboards/10205797-rebuilding-my-gas-tank

 

[iggyw1]

Might as well order the o-rings and core plugs for the sender also. Usually they are shot at this age and will cause a leak when the tank builds up pressure when it gets hot. It will save you having to pull it apart again later.

I replaced those 'O' rings and core plugs just last year in the summer. I actually replaced the gasket too at the same time. It is made of rubber and I think it is too narrow compared to the cork one I ordered yesterday. I really think I received the wrong one last year. I scraped to old cork one off and it was all tore up. Could not match it up, but the new one looked thinner (in its width) I thought at the time that the rubber one was the new improved gasket, but when I tighten the screws it squishes out of the sides of the housing assembly.

I am going to replace it with the cork gasket that I have on order. Should be arriving in my mail box this week as it was shipped today. Now one last question (I hope) With the cork gasket, do I need some type of sealer with it? I know NOT to use a silicone sealer, but what about the good ol' fashion perm-a-tex form a gasket that is not silicone? Or no sealer at all with cork?? Thanks again!

 

[boobie]

I'd put it together dry. That way it won't want to slide around. JMO.

 

[iggyw1]

I'd put it together dry. That way it won't want to slide around. JMO.

I will put no sealer on the cork gasket. I did some research on line too about this and watched a video, and everyone concurred with you on this. Thanks!

 

[jasper60103]

I will put no sealer on the cork gasket. I did some research on line too about this and watched a video, and everyone concurred with you on this. Thanks!

For future reference, do you know the part number for the cork gasket?

 

[iggyw1]

For future reference, do you know the part number for the cork gasket?

The part number for the CORK GASKET on the OMC gas tank (Johnson/Evinrude) is: #18-2881-9. Number for 'new improved' rubber gasket is: # 0125530. I ordered a cork gasket and I was sent another rubber one in error. It leaks as bad as the new one I put in last year. I called the company I ordered it from and they are now sending me another gasket, and this time I was guaranteed it will be the cork gasket. They told me to keep the one they sent me in error. LOL It is useless to me!

I can see the differance in the picture between the rubber gasket and the cork gasket. The gasket was originally cork when the tank was new. The cork gasket is soooooo much wider, and I believe it will do the trick. If it still leaks after I install the cork gasket, I figured the tank must be warped on top where the hose and gas guage are connected. The gas tank sits on the floor in the boat and I am starting to think it is warped (bent) from someone stepping on it to exit the boat (not me mind you, but the grand kids maybe?????) Any way, I made up my mind to connect my kicker motor to the same under floor tank as my main motor. It will give me a chance to remove the 6 gallon tank that is not still leaking, and make a bit more room. I know how to do this because I did this on my older boat that I had a few years ago and it worked out great. The only negative drawback about this is IF i get water in the gas, or the gas is contaminated with something else, I will not have good gas to fall back on to get back to shore with my kicker motor if need be, but I do have good towing service while I fish Lake St. Clair here in Mich.

 

[boobie]

As a last resort you could always use 3M 847 sealer but it would be a ***** to get off if you had to.

 

[jasper60103]

The part number for the CORK GASKET on the OMC gas tank (Johnson/Evinrude) is: #18-2881-9. Number for 'new improved' rubber gasket is: # 0125530. I ordered a cork gasket and I was sent another rubber one in error. It leaks as bad as the new one I put in last year. I called the company I ordered it from and they are now sending me another gasket, and this time I was guaranteed it will be the cork gasket. They told me to keep the one they sent me in error. LOL It is useless to me!

I can see the differance in the picture between the rubber gasket and the cork gasket. The gasket was originally cork when the tank was new. The cork gasket is soooooo much wider, and I believe it will do the trick. If it still leaks after I install the cork gasket, I figured the tank must be warped on top where the hose and gas guage are connected. The gas tank sits on the floor in the boat and I am starting to think it is warped (bent) from someone stepping on it to exit the boat (not me mind you, but the grand kids maybe?????) Any way, I made up my mind to connect my kicker motor to the same under floor tank as my main motor. It will give me a chance to remove the 6 gallon tank that is not still leaking, and make a bit more room. I know how to do this because I did this on my older boat that I had a few years ago and it worked out great. The only negative drawback about this is IF i get water in the gas, or the gas is contaminated with something else, I will not have good gas to fall back on to get back to shore with my kicker motor if need be, but I do have good towing service while I fish Lake St. Clair here in Mich.

Thanks for the info, iggyw1.
I have the same gas tank and it does leak a bit around the gasket.
Will give this a try.

jasper

 

[iggyw1]

As a last resort you could always use 3M 847 sealer but it would be a ***** to get off if you had to.

I think i have some of that in my garage actually. Is that compatible with gasoline? I tried Permatex form a gasket, but it was silicone and it just dissolved. I thoyght that maybe I did not let it set long enough before I used the tank on my kicker, but then I found out that silicone and gasoline do not mix. LOL

 

[clemsonfor]

yep no sealer or RTV on cork. Your rubber squishes because its deteriorated possibly from ethanol and just from age. Your form a gasket probably did not work because there is only a few that are rated for fuel contact and I bet you did not have one that was compatible.

 

[iggyw1]

yep no sealer or RTV on cork. Your rubber squishes because its deteriorated possibly from ethanol and just from age. Your form a gasket probably did not work because there is only a few that are rated for fuel contact and I bet you did not have one that was compatible.

If the rubber gasket squished because of old age, it means the company I bought it from (Crowley's marine products) had it on the shelf for a long time. I just ordered it and less than a week later I had it in hand, brand new supposibly. Also, I know for a fact that I tried a gasket material that was not compatible with gas. As I stated in my post (#13) I used silicone form a gasket and it was not compatible. I should be getting my cork gasket any day now. I will try it with no sealer of any type on the cork gasket. Like I said, if it still leaks after that, I will connect my kicker motor to my main motor gas tank. I have a three way valve on order and I have the knowledge on how to do that as I did one before on my old boat when I had it. Thanks for your input.

 

[David Young]

If the rubber gasket squished because of old age, it means the company I bought it from (Crowley's marine products) had it on the shelf for a long time. I just ordered it and less than a week later I had it in hand, brand new supposibly. Also, I know for a fact that I tried a gasket material that was not compatible with gas. As I stated in my post (#13) I used silicone form a gasket and it was not compatible. I should be getting my cork gasket any day now. I will try it with no sealer of any type on the cork gasket. Like I said, if it still leaks after that, I will connect my kicker motor to my main motor gas tank. I have a three way valve on order and I have the knowledge on how to do that as I did one before on my old boat when I had it. Thanks for your input.

​I thought mine was leaking from the big gasket. It ended up being a leak from one of the O rings that had a tear in it

 

[iggyw1]

​I thought mine was leaking from the big gasket. It ended up being a leak from one of the O rings that had a tear in it

That is a possibilty on mine I suppose. I thought of that too, thinking it may be leaking somewhere else and just looks like the big gasket leaking, but I went over and over it and it absolutely looks like it is from the big gasket for sure. I am still leaning towards going with the main tank (beneath my deck) for both motors, the kicker and main. I have a three way valve on order from West Marine (discontinued model for $7). and also a new cork gasket. If the gasket works I'm all set, if not, the three way valve is going in. LOL I had a few people using my gas tank as a step to get out of my boat in the past, and I am now thinking that the tanks is actually bent where the big gasket goes and that's why I cannot stop the leak. I now have a good step in the boat to help people get out ok.

I will post my end results when I 'getter done'. By the way David Young, I love the looks of that boat you have. Looks like it is in A-1 shape for the age of it.

 

[clemsonfor]

If the rubber gasket squished because of old age, it means the company I bought it from (Crowley's marine products) had it on the shelf for a long time. I just ordered it and less than a week later I had it in hand, brand new supposibly. Also, I know for a fact that I tried a gasket material that was not compatible with gas. As I stated in my post (#13) I used silicone form a gasket and it was not compatible. I should be getting my cork gasket any day now. I will try it with no sealer of any type on the cork gasket. Like I said, if it still leaks after that, I will connect my kicker motor to my main motor gas tank. I have a three way valve on order and I have the knowledge on how to do that as I did one before on my old boat when I had it. Thanks for your input.

That's not the case than. It would have to be old age touching gas that time not old on the shelf