1977 Evinrude 140

[89retta]

Re: 1975 Evinrude 140

Re: 1975 Evinrude 140

The terminal strip should be on the portside right above the rectifier.Thats where it is on mine

 

[rrumba]

Re: 1975 Evinrude 140

Re: 1975 Evinrude 140

The terminal strip should be on the portside right above the rectifier.Thats where it is on mine

Here is a picture of my terminals and how they are listed. If you look to the left of the label in the pic you will notice there is nothing there. That was one of the questions that i had, is there supposed to be something there or is it correct the way it is.

You can just make it out in this pic of the stbd side

This probably does not help you out much, but as soon as i get my manual in, i will surely let you know what i have found.

 

[89retta]

Re: 1975 Evinrude 140

Re: 1975 Evinrude 140

Thats where they have the decal.If you look on top port side between the flywheel and rectifier that is where your terminal strip should be.Directly in front of the coil on the far portside.

 

[rrumba]

Re: 1975 Evinrude 140

Re: 1975 Evinrude 140

Thats where they have the decal.If you look on top port side between the flywheel and rectifier that is where your terminal strip should be.Directly in front of the coil on the far portside.

Like i said earlier, when it comes ot OB, dumb as a box of rocks, not even sure where the rectifier sits :facepalm: lol

Sorry 89 have not made it to the boat. hopefully tomorrow to get that pic for you.

 

[89retta]

Re: 1975 Evinrude 140

Re: 1975 Evinrude 140

Nobodys dumb they just have'nt learned something yet.The rectifier is on the port side it has 3 wires and is round.Two yellow and one red.

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

ok guys looking for a little help here.

I got started on the rude to see what is going on with it since it is to cold to glass for the next week. I did a compression test and only got 60lbs on each of the 4 cylinders, to me that seems very low. i was expecting numbers above 100. I have the service manual but it does not say what the compression should be. The fact that they are all the same seems good, but i could be wrong. I was able to turn it by hand first before the test and also tried it in fwd n rev while turning by hand. engaged and turned freely. another good sign.

What should the compression be? I will be testing it again tomorrow as the battery seemed to be very weak and hopefully that will bring the numbers up. If it does not what should be the next steps? I will be pulling the carbs off and cleaing them as well. I was hoping to try and get it running this weekend but now with a 60lbs for comression i dobt that will happen.

any help would be great.

 

[crb478]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

Hopefully you can get the compression up over 100psi and still even, on that motor over 110 would be even better. How did you do the compression test , were all the plugs out? You will need a fully charged battery on good cables to get a accurate reading. If the cables are corroided it will never spin over fast enough. Try using jumper cables and see if that helps your numbers, also fog the cylinder walls a little, you don't want to score them up now.

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

thanks CRB, going out to fog it and try the rully charged battery. I have some pics to post as well once i get the compression done again. looks like a missing screw from the carb on the port side.

the wiring is disconnected and removed when i got it so i went straight to the starter with jumper cables.

 

[ezmobee]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

From what I understand, the actual readings on those compression testers aren't particularly accurate but they are consistent. So it's probably more important that they were all similar.

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

OK, so now I am looking for some more help here guys.....

I sprayed a little fogging oil in the cylinders, just a little, then while cranking sprayed in just a bit more then continued to crank it for a bit to help lubricate the cylinder walls and blow out any excess with the plugs out. I rechecked the the compression after that and still was only able to get about 90lbs in each of the cylinders.

Next i took the carbs off and cleaned them up and checked them, seems like someone had just done that before me, but they also lost a cover for one of the jets on the carbs

Found a very nice repair guy on sunday who just happened to be in his shop and he has OBs laying all over the place. I was able to get the cover from him, he just gave it to me, and now have a source for used parts and new parts for anything.

anyway, replaced the fuel lines and the tywraps with hose clamps while at it, and cleaned the filter on the port side, also relocated the hose clamp so it was not so close to the starter terminal, all visible in the pic below

cleaned the plugs as they did not look good

after all was cleaned up and put back together primed the carbs hooked up all cables and wiring and turned the key. and wouldn't you know it............. she just cranked and cranked and cranked.......... No start.

Checked for spark, good spark on all 4, could smell gas on the plugs, checked the carbs for gas and they had gas in them.

What do i need to check next or go on to next?

i have the manual and am reading it as well as searching the forum as well but am not having much luck. Any help would be appreciated.

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

nudge for a little help.........

 

[ezmobee]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

I don't know where all the experts are so I guess you're stuck with me If it was mine, I'd first try spraying some pre-mix in the carbs and see if it fires. That would rule out a fuel problem. If that doesn't do it, I'd get one of those spark gap testers to make sure the spark is indeed strong (of course I don't know how much gap you need it to jump :facepalm

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

thanks for the help EZ.

trying that today. Anyone else?????

Tap for some help please.................

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

ok, starting to feel lonely out here ................ Anyone???????

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

Bump...............

 

[Burglary5%]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

Not an expert by any means but everything I have read on here says that your spark should jump a 7/16 airgap. I have the 1973 Johnson 135 and that is what was recommended to me.

 

[dazk14]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

35 replies and I haven't read them all. Check spark as above. If you used a fair amount of fogging oil and it hasn't been started in a while + choke it may simply be flooded.

If you didn't use the choke, it will ordinarily be needed.

NGK plugs are not the recommended, but if it's a b7hs, it's close enough to get it running.

If, it's flooded, dry off the plugs. I'd suggest cranking the motor with the plugs out, but you must ground all the plugs - tools of which you may not have.

If you're sure you have some fogging oil in the cylinders and you do not have adequate test tools... when plugs are out spray a shot of starting fluid into all cylinders(about a second each) and replace plugs immediately. Attempt to start. Begin without choking.

I won't get into the ether debate. Often, on a moth-balled motor, some fuel/oil mix directly into the cylinder before initial startup, will save much cranking. Since, it appears you lack adequate quality tools, and are uncertain where you're at in the reawakening process, the ether will give you a quick, shoot from the hip results/indications.

If the motor is a bit worn, once started it will build dynamic compression and lots of positives can then occur that may make it a reliable runner.

Good Luck!

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

thanks burglary and dazk,

i guess i will pick up a tester for the gap. If NGK is not recommended, what should i use?

i have no idea what the previous owner had done to it, they just stated "it was running earlier in the summer" and that is only if you believe them

i sprayed fogging oil in the cylinders just to make sure they were not dry when i went to turn it over. before i did a compression test on it and prior to start it i turned it over a few times to try and blow and excess fogging oil out. then did the compression test, cleaned the carbs, changed the fuel lines. i then primed the the carbs and tried to start it. it may have been flooded, that is a possibility. I did remove all spark plugs, put them in the wires, grounded them out and had my son crank it over to check for spark. All four plugs were able to generate what appeared to be a nice blue strong spark. as stated, i will get a tester to check that it is able to make the gap of 7/16".

if anyone can tell me the recommended spark plugs i will get those and set the gap as well if someone can tell me what that is.

the book states champion UL-77V plugs and the gap is permanent. if these are what i should have installed then please let me know.

thanks.....

 

[ezmobee]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

Champions. 'Rudes love Champions.

 

[rrumba]

Re: 1975 Evinrude 140 - in progress again

Re: 1975 Evinrude 140 - in progress again

champs for the 'rude it is then with a shot of starting fluid in each to prime 'em up and see if the sleeping giant awakens