1977 15HP Evinrude problems running

[FishingAddiction]

Alright, long story short the motor went underwater while running for a few seconds. When I got it home i pulled the plugs and drained it and put oil in there to keep it from seazing up. It sat for a few months due to frustration and lazyness because it needed a new fuel line due to a leak I discovered while trying to get it running. So I got it running again after replacing the spark plugs, fuel line, pulling the carb to clean and drain the bowl. It runs for a few seconds and then shuts off. It seems like its something with the throttle. I called a outboard repair place and they said that its limited on how high it will rev while in neutral but I remember being able to rev it up while in neutral before and I shifted intro drive and it still doesn't throttle up. Any input is appreciated. Would like to save my money and not have to take it somewhere after getting it running and all myself but If I have to I will. Thanks.

 

[tashasdaddy]

Re: 1977 15HP Evinrude problems running

if you did not remove the jets and use rebuild kit, you did not clean the carb. http://forums.iboats.com/showthread.php?t=167352

also you are lucky, it even fires.

 

[glassmaster68]

Re: 1977 15HP Evinrude problems running

based on your info youve provided,assuming it runs "good" those few seconds you said it runs,,,check you primer bulb hose,make sure its not getting air or leaking and loosing its "prime",it happens,,,,,,,still not running,double check that cleanup job on the carb,make sure air/fuel ports are clean and that gaskets are aligned,i had a bowl gasket that moved everso slightly and blocked a crucial air passage on mine,so im not suggesting you dont know how to put a gasket on,just pointing out its easy to get out of alignment,and make sure they are sealing good hope that helps

 

[bktheking]

Re: 1977 15HP Evinrude problems running

Have you measured compression since the mishap?

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

Have you measured compression since the mishap?

No, I don't have the means to do so. Do you recommend getting a kit?

Thank you all for your replies, I will try these and let you know how it goes.

As far as the primer ball goes. I bought a new one a few months back because of the motor not staying running so I find it hard to believe it is bad again but they are inexpensive so it might be worth a shot.

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

I think I figured it out. The throttle is some what seazed up. I had it moving back and fourth again but it still tough to turn. How would I lubricate it? Do I have to pull the flywheel or can I just spray some WD40 under there?

 

[bktheking]

Re: 1977 15HP Evinrude problems running

To do it properly pull the flywheel, I'm surprised you didn't have it off to dry everything out under it.

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

I didnt know that would be something I would have to do. Not big on outboard knowledge. Just kind of learning as I'm going.

 

[mikesea]

Re: 1977 15HP Evinrude problems running

The magneto ,timing base ,needs to be nice and movable,its a plate with a nylon collar,when it gets submerged,it kinda sticks up,so as said,the best ou can do is get under the flywheel and dry it and lube it.Also,on the port side of the engine there is the throttle linkage with gears,the piece that sits into the lower cown pan,can also get gummed up,you can disconnect the throttle arm that is held by 2 screws and connects to the mag.lift it out and check the mobility of your throttle handle,if its nice and smoothe,you know your sticking on the eng side,if its on the handle side,you can try and lube it best you can,I prefer to totally take it apart ,clean and lube,sometimes you can run into stuck screws and the like ,and its better to do an OKIE DOKIE job and just keep spraying some silicone lube when you think of it.

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

I think I am just going to take it somewhere. Getting very frustrated with it. I had to replace my recoil spring again because it kinked up from all the pulling of tryin to get this thing running right. I replaced my fuel line ball and somewhat freed up the throttle but it still starts up runs really high for a second and then shuts off. Even with it in the start position it almost sounds as if I have it running at full throttle. Any guesses? It may have something to do with my stupidtity of turning the lean and rich knob while I had the knob off of it so I dont know exactly where it should be. Ive tried it almost all the way tight and almost all the way loose and neither seems to make a difference.

 

[bktheking]

Re: 1977 15HP Evinrude problems running

If this motor was submerged, my guess is that it wasn't torn down to the last bolt and completely dried out. Just spraying oil in the cylinders isn't near enough. Carb, reed plate, under the flywheel, all the other items that were left for months without attention. If you are serious about getting it running properly it's going to need a lot of attention and know how to make it right, bringing it somewhere might be your best plan of attack and it isn't going to be cheap. Ever see what water does to a carb? I've got a 15hp carb in my garage that had water in it, it's a paperweight now, absolute junk.


Just to give you an idea, this is the reed plate from a 9.9 I tore apart that got water in it.

This particular 9.9 is now the motor you see in my signature, I found a used powerhead and managed to save the carb, rebuilt the powerhead as well, all in all probably cost me around $300 all said and done and no labour cost cause I did it myself.

 

[ENSIGN]

Re: 1977 15HP Evinrude problems running

It sank while running,Thats when it should have been torn compleatly down not months later. I think your problems are just getting started

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

unfortunately I have a newborn, a 4 year old, a wife, and a new house so I couldn't focus all my attention on the motor. I'm gonna take it somewhere, ill let you all know the outcome.

 

[mikesea]

Re: 1977 15HP Evinrude problems running

sounds to me like you still have carb issues,whats happening is,when you choke it,or if your spraying gas directly into itit is getting a big fuel supply,so it will run at the hi rpm until the prime has burned up,,reason it stalls is it looses itsfuel source which points to the carb,the carb needs to be torn apart and soaked for a few hrs,it has small passages whithin and they get gummed up,i usually tell people to get a big carb cleaner kit,but for one little carb,if you get a bottle of engine tuner,omc has a good one,while the carb is apart,soak it well and let t sit for a few hours with the tuner ,then soak it in a good soapy hot weater bath,then get a spray can of carb cleaner,it should be sprayed with the plastic straw it comes with and blow thru all passages,if you can get it to fire at this point,your almost there,try the carb cleaner before taking to a shop at 100 bucks an hryou may spend more than its worth

 

[FishingAddiction]

Re: 1977 15HP Evinrude problems running

yeah I was thinking this as well mikesea, I am going to play with it some more. Will try soaking the carb like you said. Should I remove the float and everything before soaking it? Also I cant seem to get the flywheel to unbolt because it is just spinning when I try to loosen it and I cant hold it tight enough while trying to loosen the bolt. where can I pick up the removal tool that you bolt to the top of the flywheel? I only paid $500 for the motor, a 12' John boat and Trailer and I just sold the 12' john boat and trailer for $350 so I guess you could say I only have $150 into it. So I would hate to drop $300 to fix it.

 

[bktheking]

Re: 1977 15HP Evinrude problems running

Air gun is the best for removing the nut, or, you could use a breaker bar with appropriate socket and use a strap wrench to hold it.