1977 Evinrude 140 Stalls in gear (runs in neutral)

[ezeke]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

I wonder if you would elaborate on the following a bit:

"BUT, like I said in the beginning, there's the occasional "puff" that comes out of the exhaust from the top right cylinder, apparently indicating that it works about once a second. When I take that plug off, the puff goes away."

Specifically, what exhaust are you speaking of when you say "...comes out of the exhaust..."?

About the compression: the piston rises past both exhaust and scavenger ports, pressurizing the fuel that it has scavenged. The tighter the piston and rings, the better the compression. The compression gauge has a valve to keep the air from escaping so that you can take a reading before releasing it. Therefore, the compression is independent of what is taking place behind the piston.

Bill Kelly explains 2 bangers pretty well: http://www.maxrules.com/fixtheory2.html

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

lol...o my goodness...big brain fart...yeah you would...wow...

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

I was thinking in 4stroke...and valves...lol. reeds on backside of piston not like valves on front side...you'd still have compression. the piston actually sucks the mixture into the crankcase on the up stroke...ports allow the mixture to get in front of the piston...spark plug ignites mixture shoves piston down and compresses gases in crankcase...reed opens and allows mixture out...you'd still have compression. whats bad is I teach that in ag mechanics at school...lol.

 

[spoon34]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

Good deal... so I spray oil in the cylinder thru the sparkplug hole? Should I spray it in while it is running and then replace the plug? The exhaust I'm talking about is out of the center of the actualy propeller... the place where it is supposed to come out. Twice a second, once a second, or once every two seconds, there would be an extra poof of exhaust smoke.. nothing black - just normal smoke, but more of it. Made sense that it was a cylinder that was firing occasionally. Took of the plug cable offa cylinder #1 and the poof stopped happening.

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

that sounds like it is firing at the wrong time...does it come with a back fire?? bang?? mine did that when I first got it..."mech" had wires crossed...I would follow all your wiring...make FOR SURE that the wire coming from the powerpack is going to the RIGHT coil. Check and recheck. its easy to do. if thats not it...which it normally is from what I've been told...OR...two plug wires crossed...again...check and recheck...

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

oh yeah...spray your oil/seafoam or whatever into the sparkplug holes while it isn't running....let it set...you may tilt the motor up tonight and spray or squirt whatever your using and let it soak tonight...and start again tommorrow..you'd be amazed at what a night of soaking will do for one. spraying stuff with a plug out allows that atomized fuel to come out of the hole and if there is a spark....well you know...lol. Good LUCK! let her soak overnight.

 

[spoon34]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

I'll check... although I don't know which wire should go to which exactly. Right now it is #1-top starboard, #2 is top port, #3 is bottom starboard, # 4 is bottom port. I'm learning my boat terms. Haha. I guess I'll know once I get the manual. No loud backfire... just an extra poof... as if it would sound good if it were in syn with the other pistons. I'm gonna go to work for about an hour, then head over to my dad's barn and pull it out, warm it up and do the oil and spark stuff and test compression again. Could you please clarify as to where and how to spray the oil in? Thanks.

 

[ezeke]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

This will help, click the thumbnail:

 

[spoon34]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

wow where do u find junk like this? I guess the manual? Thanks again. Now would # 1 coil go to the top right plug?

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

I use a small 1 pint squirter to get the oil in there..make sure its TCW-3 oil....or get some seafoam deep creep and just spray to your hearts content...tilt motor up to full extent...maybe put a board under the lower unit to take pressure off the transom...like a transom saver would on a trailer...take out all the plugs...or one at time....spray or squirt your oil into each cylinder...let set for an hour or so...walk by it and turn it by hand a few revolutions...then do it again...do that a few times through the night. if you use the deep creep that will really help loosen the rings if in fact they are stuck...and when you crank it up again get ready...it will smoke like a freight train...and you may get alot of black gunk draining out if there is alot of carbon buildup. This will help loosen and clean the rings up. I would buy a new set of plugs also...get the champions...can't remember the number off the top of my head...but go champion.

 

[Ranger 330V]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

lol...spoon, thats out of his manual from the looks of it...you really need one.

 

[ezeke]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

The wiring that is sometimes messed up is the wires from the powerpack to the ignition coils since the wires are all the same color on this system.

You have to trace them to the individual screws in the powerpack. Be sure to disconnect the battery if you go in there and then seal it watertight when you are done.

The 2 ignition coils on the outside of the rack go to the bottom and those in the center go to the top on their respective sides.

 

[ezeke]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

Here is some more information that you and others can use:

 

[sldghmmr]

Re: 1977 Evinrude 140 Stalls in gear (runs in neutral)

i have the same motor u have and the same problem yhe mechanic told me its the slow speed jets in the carb clogged up and they will have to be removed and cleaned so may as well have them rebuilt and the knob on the back of the controls sounds like its the throttle tension adjuster that u use to determine how stiff the throttle control arm is to push and pull on hope i helped you out good luck