OMC Twin Line Pressure Fuel Tank Rebuild How-To, Episode 1

Today on Retro Grade, we are going through the first steps of rebuilding an OMC Johnson/Evinrude twin hose, pressure fed fuel tank, which was utilized on Johnson outboards all throughout the 1950's. Hopefully someone learns something from this. We are not sponsored by any of the links provided below.
Helpful tools used in the video:
richardsoutboardtools.com/pro...
O-Rings Ordered from McMaster-Carr:
www.mcmaster.com/catalog/129/...
www.mcmaster.com/9464K112/
For those of you who don't want to deal with any of the above and just want a nice gas tank shipped to your door:
/ thegastankman
Find more Retro-Grade content by visiting our channel:
www.youtube.com/@retro_grade?...

[@mancave9]

Great video! Thank you for your time

[@retro_grade]

Thanks! Hope it helped!

[@joshual9759]

Thanks for this

[@retro_grade]

No problem, hope it helped!

[@shornandkenny]

Great vid

[@retro_grade]

Thanks! Seemed a little bit drawn out for something that 'should' take like 5 minutes to do, but oh well. Wanted to get another dual line ready to go and start getting some of my old motors running (content that's also been filmed in sitting on a hard drive) and figured I'd use the opportunity lol.

[@danieljohnson-li8tg]

U need to make the tank rebuild video

[@retro_grade]

Yeah I know, I will get to it at some point - have several videos stacked in front currently. If you're looking on how to do the top section and have Facebook, look up the Gas Tank Man (Elton Duffy). He rebuilds tanks and posts alot of 'how to's' and 'tips and tricks' on it. I know that I've seen a couple of posts from him about rebuilding tank tops (rebuild kit quality, type of diaphragms, direction parts go in, etc).

[@benwalters9222]

Thank you for the video! Looking forward to part two! I have two of these gas tanks, one Johnson and one Evinrude and BOTH are leaking fuel around the priming button. I have found the replacement gasket kit and the replacement diaphragm kit but I'm on a tight budget. Do I need both kits to fix this issue or just the gaskets/ just the diaphragms? Thanks!

[@retro_grade]

Sure thing! I would say you'd probably want to order both just in case. I can't remember what each of them include of the top of my head. So, if you break a gasket getting to the diaphragm, then you'll need that. Even though, the diaphragm is what sounds like is leaking on yours. There are two types of kits depending on the primer button you have, you need to pick the correct one. Find a guy called "The Gas Tank Man" on Facebook and look through some of his posts. He has several showing replacement of the diaphragm and at least one showing the differences. He also sells both types of kits at a reasonable price (10 bucks each or so?) that are good quality and has some posts showing "cheapo" ones that don't work as well.

[@benwalters9222]

@@retro_grade Awesome thank you for such a quick response!! I'll look more into that! So far you're the only video I've found on these, not even TMike has a video on this yet LOL🤣

[@BigTonysRips]

Wait… how did you get it to stop spraying gas after? I did a whole new kit on mine and it’s just pissing gas out of the primer. I’m so irritated and at a loss very frustrated

[@retro_grade]

I didn't - if you didn't notice, I grabbed another can that I had which didn't do that to put the new line on. It was supposed to be a joke, since I said they almost never do it. You need to replace the gasket/diaphragm on the tank to to get the primer to stop doing that. I was going to do an Episode 2 once I refurbish that can showing the replacement, and I just haven't gotten to it yet. This video didn't really fetch enough views to get me in any hurry to do so either, LOL.

[@thomashart1560]

I'd watch! ​@@retro_grade

[@paulweller3041]

How would u fix a pinhole in the tank any suggestions?

[@retro_grade]

Depending on the overall condition of the tank, many times I wouldn't bother. As when most get pin holes, it's because they're rusting out anyways. I wouldn't opt for a liner such as Kreme - those liners will flake off on the inside of the tank over time and create a mess, and if they need it that bad, they're too far gone anyways (I find this mostly on motorcycle tanks). If I had to though, I probably would just opt towards JB Weld or fuel tank repair putty (think JB weld in play dough form). Both work OK. I have had a couple of tanks welded for repair, but surrounding material has to be thick enough and the heat from the weld will burn off any surrounding paint. Also, the tank obvsiously needs to be dry of any fuel or fumes before that can be done.

[@joshuamunoz5036]

Great video-how are the orings holding up with gasoline ?

[@retro_grade]

Thanks! To be honest, I haven't even had the thing out really since rebuilding it. Too many projects and not even even time to take one of the old motors out! I'll likely even do a 2nd video installing a top diaphgram before making it to the lake 🤣

[@joshuamunoz5036]

@@retro_grade that’s great news. I’ve been looking for a video on how to install the gaskets and all and Hope to see it soon.

[@johnbladykas4885]

Next time spray on the fittings before you put the rubber hose. To clamp down the fittings use channel locks or pig end pliers

[@retro_grade]

Well I don't think the camera captured it, but I spit into the hoses. Normally, I have an old bottle of 'Black Magic' tire shine that is very slippery and works well for putting stubbon hoses on, but that would have required me to walk over to the cabinet and get it. LOL. I don't have a set of hog ring pliers - those do look handy for this application, I may have to get some just for that. Thanks for the comment!

[@ormondbrewingco6358]

My take away from this video is that people are sissies! Haha! Thanks for the video tutorial.

[@retro_grade]

Hahaha, this is true! 😂 No problem!