1984 Evinrude 140 Help

[archcycle]

Re: 1984 Evinrude 140 Help

The motor runs good when I keep the throddle fairly low but when I put the throddle down past a certain point the motor will run like a dream for 20 seconds and then bog down to a near stand still sometimes stalling all together. I have also tried pumping the fuel ball and its always hard as a rock.

That doesn't sound like a problem getting fuel to the carbs so all the rest about the fuel pump is probably off base. That's a very expensive part to replace on a hunch!

You really should check the spark on each cylinder. Go to any auto store and buy a spark tester. unplug all 4 wires from the spark plugs, and plug the tester into each one with the ground on something with a good clean unpainted surface. See if you have a strong blue spark jumping 3/8 inch on all 4 plug wires.

Also get a compression tester and test all 4 cylinders. Comp tester will run you around $10 and spark will run you around $5. You need spark, fuel, compression to run. You can test 2 of the 3 for under $20 which is less than the price of one carb kit and a LOT less than another fuel pump.

 

[AlTn]

Re: 1984 Evinrude 140 Help

marineengine.com shows having 5.. f/p..5007423...$306/ea....fwiw

 

[BigDVO]

Re: 1984 Evinrude 140 Help

Also get a compression tester and test all 4 cylinders. Comp tester will run you around $10 and spark will run you around $5. You need spark, fuel, compression to run. You can test 2 of the 3 for under $20 which is less than the price of one carb kit and a LOT less than another fuel pump.

Thanks for the excellent advice. I will borrow both of these testers and head to my cabin tonight to see what the results are. The only thing that makes me think its the pump is the fact that I crawled home with the boat last night at a very slow speed. The motor was running worse. I was pretty low on fuel but I wasnt empty. Anyways before it would stall out my father would squeeze the fuel ball a little bit and it would seem to stay running instead of stalling but I cant be sure. Its just running like ****. I have found a fuel pump in my province and was going to ask them if I could bring it back if I didnt need it. I dont want to miss out as these fuel pumps are on national back order. I will order the kits and clean the carbs for sure. They have never ever been looked at since we owned the motor brand new. Im thinking that 28 years of fuel sitting in the bowls will have caused some problems lol. I am also going to change out the thermostats while I am at it. It would be nice to have the pump incase it is the problem but I will hold off ordering it if I cant return it un-used. Thanks again everyone.

 

[BigDVO]

Re: 1984 Evinrude 140 Help

Ok, I will wait on the fuel pump order as anything fuel related has a no return policy. At least its in my home province if I need to order it I should have it in a day or two. I just hope it does not sell.

 

[BigDVO]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Ok, I am at my cabin on my blackberry. Something didn't look right. I got my motor put on at a merc dealership. They were looking around for evinrude lines and stuff for me. Here is my question. The little piece that connects and snaps the gas line to the motor. Is it possible that a merc connection would be different and causing me fuel problems or are all the connections the same? Please let me know because if so I will make the 2 hour round trip to get my oldconnection

 

[BigDVO]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Ok. At the cabin tonight I pulled the boat out of the water and checked the spark and the compression. The spark was good on all cylinders and 3 of the 4 had 120 compression and 1 had 105.
Not sure if the 105 is anything to be worried about. I hope my carb kits and thermostats are in tomorrow. Anyways. If someone could please help with the question above about the gas hookup to the motor it would be great. It seems the hookup on the motor has the little button thing much further down in the connector. Im wondering if this could be restricting the gas flow?

 

[emdsapmgr]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Rule of thumb is that the compression on each cylinder should be within 10% of each other cyl. You are borderline low with one cyl at 105. I'd be inclined to do a decarb on the engine and see if that cyl compression improves any. If not, pull the head and make a visual inspection of that cyl.

 

[BigDVO]

Re: 1984 Evinrude 140 Help

Ok. I am heading back to the cabin tonight with the fuel line end that was on the motor origionaly. My carb kits and thermostats are in so I can also get those two things taken care of. I still have not heard from anyone regarding the fuel hookup at the motor. The one that was put back on there is visably different from the origional evinrude one. The little silver ball thats in the connection is seated further down in the connection. I am wondering if this might be affecting my fuel flow if the stem off the motor is not long enough to push it down all the way. Does this make sense to anyone?

 

[BigDVO]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Rule of thumb is that the compression on each cylinder should be within 10% of each other cyl. You are borderline low with one cyl at 105. I'd be inclined to do a decarb on the engine and see if that cyl compression improves any. If not, pull the head and make a visual inspection of that cyl.

Thanks I will do another test after the carbs are cleaned up and go from there.

 

[archcycle]

Re: 1984 Evinrude 140 Help

The one that was put back on there is visably different from the origional evinrude one.

This seems unlikely. The merc and other brand connectors are quite different but if it doesn't hurt anything to put the old connector on, go ahead and try! You may just be looking at two OMC connectors made by different manufacturers. Like an original OMC and an Attwood.

Like emdsapmgr said that compression is very close to being in the OK range. Close enough that in my limited experience I'm going to venture that it's not the culprit. +1 on the decarb and check again.

Post results from the carb rebuilds.

 

[BigDVO]

Re: 1984 Evinrude 140 Help

I will be sure to do that. Im heading out right after work. I will let you know how the carbs look before I soak them.

 

[larryg]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

merc connections are diffrent.

 

[kenmyfam]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Did you actually check the fuel pump output ???

 

[RZR2007]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Are you still using the VRO or are you premixing your fuel?

 

[levi_tsk]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

'84 is the last year for non VRO being standard trim

 

[RZR2007]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

Is the non VRO pump $400??

 

[BigDVO]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

MAJOR UPDATE. Removed the carbs tonight so a friend can clean them up and made a shocking discovery. One of the jets is missing in action LOL.. I think I can read a 36 on the other three. Im hoping that it has found itself a safe non threatening home somewhere safe inside lol. I will replace the jet after the carbs are cleaned up. Do you think I have found my problem? Do my earlier symptoms point to yes? Looks Like a 36 on the jets. Part number 323703. I hope its easy to find local.

And yes I am still running the oil seperate.

 

[emoney]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

It does sound like you may have narrowed down your search. As to the "fuel connection" question; if it's run before, then that isn't the culprit. An 'incorrect fuel line coupler' wouldn't allow you leave the dock, or at least get very far. Clean those carbs really, really well making sure there's no junk in any of the jets or little nooks and crannies, and then see how she runs. While you're at it, double check the fuel line from the carbs all the way to the tank and make sure it's in good shape as well. I didn't see where you inspected the diaphram, but that's a part that can easily wear out and flake that's very inexpensive to replace. If there is a fuel pump issue, it's normally found there.

 

[bernd64]

Re: 1984 Evinrude 140 Help,

Re: 1984 Evinrude 140 Help,

the OMC carb kid #0393872

CARBURETOR REPAIR KIT

 

[BigDVO]

Re: 1984 Evinrude 140 Help

Yea I figured that since the jet was missing I must have found my problem. Im thinking that it would run with little throddle because not much gas was going into the carb and with out the jet when I opened her up a bit the gas would be pouring into the carb like a garden hose causing it to bog right down. I am having the carbs cleaned right up and I will get the replacement jet. Im hoping this will solve my problem. I tried the other fuel connector before the carb came off thinking it could be my problem but no luck. Now I have to track down that jet