Greg Foster Posted October 7, 2020 Share Posted October 7, 2020 Hi all i need a replacement tank 23 litre old metal one the old one Found a nice stainless one but wife won’t spend $400 🤯 the old one only needs a new cap as the breather valve has been painted over and won’t relieve pressure I don’t want a smaller tank as they are half the capacity and I like having more than less I have heard that you can tighten the cap Halfway instead of full lock ,which would Let the fumes out but wife doesn’t like the idea of a loose cap Any idea were I can get a used cap to fit the old tank thanks greg Link to comment Share on other sites More sharing options...
noelm Posted October 7, 2020 Share Posted October 7, 2020 The cap breather is a pretty simple gizmo, it's more or less just a bolt that opens a hole, there is lots of plastic tanks available that are the same size and are reasonably priced. Link to comment Share on other sites More sharing options...
noelm Posted October 7, 2020 Share Posted October 7, 2020 OH, and the breather is not designed to let fumes out, it's made to let air in when fuel is used. 1 Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 Aha so short term I can leave cap half on and use tank ? Link to comment Share on other sites More sharing options...
zmk1962 Posted October 7, 2020 Share Posted October 7, 2020 I would not recommend that. You do not want fuel fumes building up. That is an accident waiting to happen. As Noel said they are designed to let air in and no fumes out. Have you tried to clear the paint that’s blocking the breather. Maybe wire brush and soak the cap in acetone if you can’t find a replacement? Also Maybe take the old cap to auto spares shops they often have aftermarket variants. cheers Zoran Link to comment Share on other sites More sharing options...
noelm Posted October 7, 2020 Share Posted October 7, 2020 Those old OMC metal tanks have not been made for years, but you see them for sale cheap at markets and garage sales, I reckon you could fix the breather in about 2 minutes Link to comment Share on other sites More sharing options...
frankS Posted October 7, 2020 Share Posted October 7, 2020 I have 2 or 3 of those old tanks down in one of the sheds, I'll have a look 6tomorrow and see IF they still have caps and if they are serviceable. If so you will need to PM me your address and I will post you 1 up. Frank 2 Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 That would be great frank thanks Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 I asked wife about acetone but didn’t have any i took some pictures of the cap  I am guessing I should have a spring in the cap somewhere? Link to comment Share on other sites More sharing options...
noelm Posted October 7, 2020 Share Posted October 7, 2020 Why would there be a spring? Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 Sorry Noel I presumed you would need a spring for the breather to work on the cap so the middle part should move a couple of mm,s to allow air in without the use of a spring?  Link to comment Share on other sites More sharing options...
noelm Posted October 7, 2020 Share Posted October 7, 2020 It's very hard to see in the pictures, but, is that just a simple screw in the middle of the cap? some vented only when the fuel line was connected at the connection point, not by unscrewing the cap, the later model metal tanks had the auto vent set up. Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 Hi Noel The middle of the cap doesn’t seem to move or budge but is joined to the piece of metal on the underside of the cap in the picture a few photos up. The  whole tank was painted silver when I got the boat Including the cap and fuel hose connection Another query should the hose be rock hard that connects tank to engine or is that just age and if it vents when fuel line connection is on what would I look for ? Link to comment Share on other sites More sharing options...
zmk1962 Posted October 7, 2020 Share Posted October 7, 2020 Greg, the hose should be relatively supple but not collapse on itself or when you put a bend in it. BTW, what problem are you trying to solve that indicates you have a vent problem? cheers Zoran Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 Hi zoran this problem was first trip after full service boat in water started ok found a fishing spot,wife wanted to move 5 minutes later motor wouldn’t start like it was starving of fuel continued fishing for an hour or so then tried to start it again All good trundled back to the boat ramp motor was surging at about 3 knots in a low speed zone on way back also leg was hot to touch when lifting and locking in place took straight back to mechanic on way home leg heat was thermostat issue all fixed fuel was tank wasn’t venting all painted over mechanic suggested cracking cap on tank when going on water - Wife not agreeable to this as well as me looked at replacing tank 23 litre stainless steel - me yes wife no or fixing existing tank Compromise I looked on my tank it is a model 6 looked on google and I think it must be an auto vent the fuel line is also bent in a few circles from where it sat on top of tank I presume the fuel line is old not being flexible and will replace this when my tank issue is sorted out  greg       Link to comment Share on other sites More sharing options...
zmk1962 Posted October 7, 2020 Share Posted October 7, 2020 (edited) Hi Greg, I seem to recall you may have posted this problem previously. Strange that the mech had to relook at the thermostat after just having done a full service ... that should be part of any full service! Ok from what you describe both the tank and fuel line are pretty old. If the mechanic concluded the surging was from the motor starving for fuel, then the line and fuel bulb could be contributing to the problem eg there could be debris in the line from the inner liner degradation, the bulb could be collapsing or the check valve getting stuck. I'd replace all that, you are going to have to do it anyway. I'd then try and borrow a "good" tank from someone. Get back on the water start with the borrowed tank and confirm your motor runs / restarts without issues. If everything works ok, you have confirmed the fuel line, bulb and the motor are all ok. Then swap to your old tank and repeat the test. If everything works, the issue was the fuel line/bulb. If its still surging failing to start, then open the fuel cap half way and see if that resolves the issue. If it does, then its the cap for sure. Cheers Zoran BTW - I just had a quick google, a new plastic 23L tank is like $50-80 and readily available in all the usual outdoor retailers. Edited October 7, 2020 by zmk1962 Link to comment Share on other sites More sharing options...
Greg Foster Posted October 7, 2020 Author Share Posted October 7, 2020 Thanks zoran I also watched that dude from danger marine on you tube with old fuel lines my son in-laws dad has a spare plastic one I can borrow so will do as you said take it for a run and see what happens Link to comment Share on other sites More sharing options...
zmk1962 Posted October 7, 2020 Share Posted October 7, 2020 Perfect. Process of elimination is your best approach ... Best of luck and keep us posted. Cheers Zoran Link to comment Share on other sites More sharing options...
noelm Posted October 8, 2020 Share Posted October 8, 2020 Is this the original tank that came with the motor? the ones that are vented by connecting the fuel line use a slightly different fitting (if I remember correctly) if you can borrow another tank, try to borrow the fuel line too. Link to comment Share on other sites More sharing options...
Greg Foster Posted October 8, 2020 Author Share Posted October 8, 2020 Thanks Noel I will Let you know what happens Link to comment Share on other sites More sharing options...
frankS Posted October 9, 2020 Share Posted October 9, 2020 Greg. Have a cap here but it's not even as good as the one you already have, years of just sitting around hasn't done it any favors. So not much point in sending it up for you. Frank Link to comment Share on other sites More sharing options...
Greg Foster Posted October 12, 2020 Author Share Posted October 12, 2020 Thanks anyway frank my wife found another near new omg tank on Facebook so we got it and delivered for $20 just a quick question for this i am getting new tubing,bulb and attachments at whitworths do I take the old bayonet fitting on the tank that’s screwed in off to clean or get some acetone on a brush to clean it all up (Presume auto vent is built in here)   Link to comment Share on other sites More sharing options...
Greg Foster Posted October 12, 2020 Author Share Posted October 12, 2020 This is the new old tank fitted Link to comment Share on other sites More sharing options...
noelm Posted October 12, 2020 Share Posted October 12, 2020 If replacing the fuel line and primer bulb, do NOT use cheap aftermarket ones, spend just a few dollars more and buy a genuine brand name one, the cheap bulbs fail in quick time. Link to comment Share on other sites More sharing options...
noelm Posted October 12, 2020 Share Posted October 12, 2020 OH, just clean up the old fitting, there's not much to them, make sure you new fuel line has the correct fitting, there is a few different sizes. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now