WOW!
I just bought a cheap in-line automotive type that can't leak.
OK ...so you do have an electric fuel pump ...lets just not lat it happen again ;)
Should have reread entire thread again ...
Sorry for blowing up on ya Joe ... LOL
Nope. That was a big restriction. The hose goes from the filter to the carb.thanks, looks like a stop at Hannay's for some OMC fuel line...
Did you try what I said and bypass all wiring to the coil? It does seem more electrical than fuel the way it kills. Could be a short in the ignition switch or something going on somewhere in the wiring.
Maybe I'm making waves in this "subject pond" but it seems that it is being over thought.
What did the engine come with from the factory? How long did it last? With all the quality makers such as Holley, Mallory and more I'm sure a new mechanical fuel pump will fix the issue if that is indeed what the source of the problem is.
Have you tried running the motor in the driveway and let it heat up? In a tank? If you feel it may be a heat/fuel issue, run on the lake without the engine cover and see what it does. Put a long hose on the fuel pump output that goes to the carb and run it into an empty gas can. Kill the ignition and turn the motor over and see how much fuel output you have. See what you have in the can. That will tell you if you have ample flow. You can rent a fuel pressure gauge and put it inline and see what you have while running. That will answer another question. It takes a lot of heat to vaporize fuel. Is your motor running hotter than normal?
All of our outboards and I/O's came with mechanical fuel pumps and they have worked fine for decades. Mine is original from 1977. Never broken into since 2005 from the original owner and I have done nothing to it in the three years I've had it. I ran the 115 this weekend for a total of 16 hours in temps reaching 102 degrees. Water temp was 80 degrees. That's hot.
Just for peace of mind I would change every inch of fuel line from the tank and under the hood. Not that expensive and you know it's new.
One thing I have heard from at least a dozen of marine mechanics of all calibers (one being a former mechanic for Reggie Fountain Racing) is that with the ethanol issue, many people are over-filtering their fuel and causing low fuel supply to the engine. The Fountain guy said he gets many OB's in with fuel/water filters, factory filter mounted in the engine and sometimes a third filter. Too many filters for the pump to try and pull through. Even with the humidity down here (85 - 100%) from May to October you will hardly find fuel/water filters on any boats that are running mechanical fuel pumps. Each filter is a restriction.
I know it's frustrating trying to figure out what gremlin is causing you so much stress. Make a list of the simple things that we tend to overlook in haste and start eliminating them one by one. You could have a bad coil that is overheating? That happened on my dad's '69 Merc with a 429. Drive it in Louisiana heat for about an hour and it would die. Checked everything and someone said to change the coil. Never did it again for the remaining 5 years he had it.
My 18 had a kind of similar problem last year and I found the choke wire and a wire that went to the HEI melted together. It would run but then when shut off would not start. Have you checked wiring? I would look at the wiring cut the wrap on it if there is any and look for a melted wire. That was another problem I had with my trim this year. Couldn't find anything that caused it but cut out the bad and put in new and works fine.All my wiring back there has been replaced but I suppose something could have melted. Of course I have it all cable tied and in plastic wire loom to clean it up and will likely have to pull that all apart.
Ross, bring my old elec fuel pump if you are done with it. I am working on converting my Tempo to carbureted.Yup, its packed as well as your plug wires.
I will bring my inline spark tester so we can make sure we are getting spark when it stalls out. And a different set of resistors.........just because we are running out of things to try!
I will bring yer HEI and all Jasons stuff too, and the module i have. i will also bring my fuel pr gauge and of coarse i go no ware with out a bunch of tools.Yeah Ill be bringing a bunch of stuff. I'll be stopping at West Marine on the way to pick up some more 5/16 line since that is what fits nicely over 5/16 steel line which is what I have running to the carb.
make sure you drag yer extra fuel line stuff (hose fittings clamps) just in case
WE WILL GET IT GOING !!!!!!
Ross, when are you planning to get there tomorrow ?
Ross is your key switch 3 or 4 position? I have the old one from Phoenix Rising we could bring with us that was working well when I switched it out this spring. If it comes down to that.
Ross is your key switch 3 or 4 position? I have the old one from Phoenix Rising we could bring with us that was working well when I switched it out this spring. If it comes down to that.
I guess its 3 if you count "off"
That would be great. That is one thing I don't have extra of. Did you switch yours out as part of troubleshooting? So you know its good?
Ross, i know yer frustrated with this problem and feeling like you have done lots of stuff that hasn't fixed it. keep in mind the fuel tank issue would have had to be addressed anyway, and now you know all yer lines are good.
when we worked on it at my house, and when we were on the st croix i believe it was verified as a fuel issue (at my house observing low fuel pr on the gauge, and on the st croix by Jeff observing no accelerator pump squrt after it killed.
i realize the only component in the fuel system that has not been bypassed is the filter, though i doubt it could be that.
also keep in mind we could be struggling with more than 1 issue or bad component, and something that is new or rebuild could still be suspect.
lets plan on installing fuel pr gauge and Jason's spark tester and test those things tomorrow. i am going to try to get out of the house by noon as i want to water test mine some on Thursday as well.
Agreed and although I have replaced it (25.00 each) we just might want to by pass it. I may have to run to Menards unless anyone coming has the parts needed to join 2 pieces of rubber line, such as a bushing and 2 3/8 barbs.i will put that on my list