1972 evinrude 125hp converted?

[jay_merrill]

Re: 1972 evinrude 125hp converted?

LOL, thanks. That said, notice that I stick to certain groups of motors. Trust me when I tell you that I am completely stupid about others!



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[jonnymarquis]

Re: 1972 evinrude 125hp converted?

no one answered my question, or at least i thought i made it into a question. i did have a spark for a minute then i went away. would this mean that maybe the pulse pack wasn't bad and maybe something else? idk just a thought. ty in advance jay and fr or anyone else.

 

[jay_merrill]

Re: 1972 evinrude 125hp converted?

I think F_R did answer your question, in his discussion of the role that the battery plays in your ignition system. I can see a situation where you could get spark for a minute or so and then lose it, if the battery were right on the edge of being dead. An easy way to see if this is the issue, is to just charge the battery and see if they is any improvement.

Given that your motor has had some wiring problems, however, you could also have some issues there. A badly spliced wire, some corrosion at the splice, etc, could be casuing an intermittant situation.

Its also possble that the battery connections are bad. This is a pretty common situation. The first step here, is to make sure that all of them involve good metal to metal contact with no corrosion and that they are all tight.

Its pretty hard to troubleshoot a motor by forum entries, when these sorts of possibilities exist. I really think that you either need to find a friend who has enough knowledge to go over the motor with you, or you need to find a competent mechanic, who can perform some real trouble shooting. If the rectifier looks like it is toast, that's a good place to start. I would still go through the rest of the wiring though.



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[jonnymarquis]

Re: 1972 evinrude 125hp converted?

OK ty for the reply I'm having a friend mechanic (an auto mechanic but hes good on electrical as well) come over to try and help me trouble shoot it, ill come back and let you guys know what we find ty again.

 

[jay_merrill]

Re: 1972 evinrude 125hp converted?

That's good - he will have a good understanding of how to troubleshoot in an organized and effective manner. What he will need to do this successfully, is an OEM manual. He may be able to get some information out of the aftermarket manuals, but they are generally not very good.

Here's a listing on EBay for one - the seller only wants $22.00, plus shipping, which is a bargain. Buying a reprint would probably cost you close to $100. I would snap the EBay item up today, before someone else does.

Once you obtain it, have your friend get into the ignition system section of the manual and look for tests that can be done with a multimeter. If the manual is set up like most of the OMC manuals of that era, this will be in Chapter 4.



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[jonnymarquis]

Re: 1972 evinrude 125hp converted?

yes actually i bought an omc repair manual for this motor off of ebay when i bought the motor. for about the same price. so hopefully when he comes tomorrow he can diagnose it with me and we can make something out of it, ty though for the ebay suggestion, but i remember when i first bought the boat and first found iboats.com i found an article saying if you buy a boat buy the manual for your specific motor, will help a million ways past Monday, lol. maybe it was your post, idk, anyway ty jay

 

[F_R]

Re: 1972 evinrude 125hp converted?

Trouble is, the manual was written in 1972 technology and tells you to use an obsolete S-80/M-80 neon tester. Ask your friend to bring a peak reading (DVA) multimeter with him.

 

[jonnymarquis]

Re: 1972 evinrude 125hp converted?

i uploaded a video please view guys for more. i did get the bat fully charged and it is running, so....... http://www.youtube.com/watch?v=j7oH0NoQJ_8

 

[F_R]

Re: 1972 evinrude 125hp converted?

First, there is nothing wrong with the power pack. It wouldn't run at all if there was.

Secondly, I suggest you pull the flywheel and check the distributor cap, rotor, sensor gap, reverse cut-out ring, and check all spark plug wires for continuity. Check the sensor wires for continuity. Hopefully, nobody has mixed the plug wires and got them on the wrong plugs (?)

And...check the spark at the coil wire (removed from the distributor cap). And...make sure no plug wires are arcing out at the dist cap. BTW, all wires screw into the cap. Dont try to pull them out

There just are no short cuts. If everything is right, it will run. But you can't stand and guess at it.

 

[jonnymarquis]

Re: 1972 evinrude 125hp converted?

fr or jay have you checked out the video?

 

[jay_merrill]

Re: 1972 evinrude 125hp converted?

Trouble is, the manual was written in 1972 technology and tells you to use an obsolete S-80/M-80 neon tester. Ask your friend to bring a peak reading (DVA) multimeter with him.

F_R, I don't know this motor well and agree that lots of the tests usually referenced make use of the special tesing devices, but there may be some ohms tests that can be done. My '72 J65 manual lists a number of them for the ignition system. Granted that is a different system (magneto CD), but I would at least look at the manual.



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[F_R]

Re: 1972 evinrude 125hp converted?

Um......did I say ignore the manual? Actually, the manual is a necessity if anybody is going to troubleshoot one of those systems. How else is anybody going to know how it works? Once you understand the way it works, and understand basic electricity, the rest is easy. That old neon tester was a nice gizmo, but all anybody needs is a common multimeter.

And yes, I watched the video.

 

[jay_merrill]

Re: 1972 evinrude 125hp converted?

Just watched the video. The fact that it wants to run when choked, suggests a mixture issue. Even after a carb rebuild, sometimes things aren't quite right. A missed step, some junk still in one or more LS jets, junk in your gas tank or a disintegrating fuel pump diaphram, can all cause problems.

I would look at the ignition section of your manual to see what tests you can do, just because you might be able to rule out some possibilities on the ignition side of things, but I'm thinking you still have fuel delivery issues.

BTW, I saw a hose and muff hooked up, but no water running - not a good thing for your water pump impeller!



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[jonnymarquis]

Re: 1972 evinrude 125hp converted?

yes i was to involved with making that video that when i came back outside to tape it, i didn't turn the water back on, but i did notice this as soon as i turned off the camera and i turned it back on, so i hope that it didn't mess it up, it is still pumping so. I'm pulling the carbs off again and soaking all night again and blowing out. see if this helps. it did when i first bought it so ill see again i was just hooked on the electrical side for along time, that i never thought it may be those carbs again. ty again

 

[jay_merrill]

Re: 1972 evinrude 125hp converted?

If you are just soaking the carbs without taking them apart, that might not help you. Its important to make sure that you get any possible bits of junk out of them. That usually means removing the core plugs, blowing the passages out and replacing them too.

I also like to put a small in-line filter between the fuel pump and the carbs. The photo below is an example. I initially put elbows on a standaard filter, but later replaced it due to some leaking. The second time around, I just left it with straight nipples and didn't bother to mount it with a clamp. Its been that way for awhile and works just fine.

Another possibility is that the carbs were sucking air someplace other than via the throats. By choking the motor, if this is the case, you are reducing the airflow back to a more normal situation. I'm more of a two cylinder and three cylinder guy, but I'll just offer this as something to keep in mind and maybe one of the other guys can chime in, if that ends up looking like a possibility.

Don't forget to do what F_R suggested too. He knows his stuff, so there are possibilities to be explored.



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