Andy,
There's another easy way to check electrical operation of the coil. With the ignition key on, but motor not running, shift from neutral to forward and then repeat for reverse.
You should be able to detect similar current flow for both directions. You can usually observe this a couple of different ways: A) Close obeservation of the ammeter, and I do mean very close. B) Close observation of a light bulb or volt meter, as there should be a barely perceptable voltage drop when the coil engages (this is also a function of state of battery charge, ie a smaller weaker battery, will have a larger voltage drop. I'm guessing (educated) here, but I've never heard of a clutch coil electrical failure due t0 mechanical interference/stoppage. Clutch sping yes, coil no. The "tab" is part of the spring.
Without access to the special tools, you mention, personally I wouldn't attempt to do the lower unit repairs in the wild. My educated guess is you'll be able to get all the parts back in Detroit. So if it were mine, I'd call it a season and do the repairs with the proper tools and service manuals handy vs on the edge of a lake or back of the trailer. Sorry my news isn't happier.
Lee
________________________________
From: omc-boats-bounces@... [mailto:omc-boats-bounces@...ultimate.com] On Behalf Of ANDY PERAKES
Sent: Monday, August 17, 2009 9:16 AM
To: Evinrude & Johnson Boats of the 1960's and 70's
Subject: Re: [OMC-Boats] Forward Clutch Won't Engage on Late-1967 3-wire Shifter - Update
Thanks, Lee. I just realized my earlier reply to Don went only to him, but I was able to walk my wife through measuring the coil over the phone this morning. Unfortunately I only have a cheap multimeter with 10k or 1k scales so both readings of "0" could effectively have been "0" else 4.5 - 6.5 ohms on that scale. If I can get the parts this week, I feel fairly confident I can do the repairs next weekend. I think my two biggest concerns are:
1) Do I need any special tools to get it apart and put it back together?
2) Getting parts (especially not know what part(s) failed)
I lost all of my special tools (gear/bearing pullers, clip spreaders, etc.) with my Dad's toolbox (long story so let's just say I hope none of you ever have to experience the horrors of Alzeheimer's) and I only have a limited tool set at the lake. It was late by the time we got back in so I ended up leaving my whole rig there (including manuals - d'oh!); if you think its the spring tab that broke and I can find one for a reasonable price, I just assume get one now (I have much better luck finding parts near Detroit vs. the small town in Ontario where I boat). Its not just the repair costs, but if I have to depend on a shop, my season will most likely be over and August is the best month around here. Is this spring tab part of the spring itself, i.e. I need to find a spring pack? While I'm waiting for my wife to bring my manuals back, I'll try pulling the part #s from the BRP site in hopes of tracking parts down after work today (Michigan Marine Gear usually has this kind of stuff in stock). What about gaskets, springs, circlips, etc. -- anything else you think I'll need?
----- Original Message -----
From: "Lee Shuster (lib1)" <lib1@...>
To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...mate.com>
Sent: Monday, August 17, 2009 9:58:13 AM GMT -05:00 US/Canada Eastern
Subject: Re: [OMC-Boats] Forward Clutch Won't Engage on Late-1967 3-wire Shifter - Update
First check the forward and reverse coils (one at a time with an
ohmeter, out of circuit.)
A good coil will read between 4.5 and 6.5 ohms.
Most likely the electrical coil is okay but the spring tab has broken
off.
I wouldn't recommend fuse-protecting the coils, but you can calculate
the current flow in amps using Ohm's law. I generally see 2 to 3 amps
current draw on my digital ohmeter, when shifting with the motor not
running and battery at approximately 12.3 volts.
Lee
On Aug 16, 2009, at 10:46 PM, jd wrote:
> yikes. this strikes fear in the hearts of .......me.
>
> both the up and down wires are pretty accessible before they get to
> the outdrive stuff.
>
> a) any technical reason why a person couldn't put an inline fuse on
> both those wires just for situations like this? It would be pretty
> easy to do.
>
> b) any technical reason why OMC didn't back in the day?
>
>
> (there i go again, wanting to put fuses on everything)
>
>
>
>
>
>
>
> On Aug 16, 2009, at 7:54 PM, ANDY PERAKES wrote:
>
>> Yeah, that's what I was thinking too. I was a bit surprised there
>> was no fuse -- at least not one outside the stern drive (I guess
>> there could be one inside, but it doesn't show on the schematics
>> and doesn't seem a likely place to put one). What I didn't get to
>> do was test the resistance of the coils so I guess that's next, but
>> barring any big surprises from the group, it looks like I'll be
>> taking my first foray into the lower unit. It still seems odd to
>> me that the coil would go so quickly like that, but I guess it's
>> possible. There's no sound like something chunking around or loose
>> when I turn the prop by hand or run in reverse.
>>
>>
>> ----- Original Message -----
>> From: "Don Mandelas" <dmandelas@...>
>> To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...ltimate.com
>> >
>> Sent: Sunday, August 16, 2009 9:20:23 PM GMT -05:00 US/Canada Eastern
>> Subject: Re: [OMC-Boats] Forward Clutch Won't Engage on Late-1967 3-
>> wire Shifter - Update
>>
>> Since you have power all the way back then I guess its not a fuse
>> which would protect the forward coil.
>>
>> Don
>> 1697 Sportsman 155
>>
>>
>> Date: Sun, 16 Aug 2009 18:17:09 -0400
>> From: aperakes@...
>> To: omc-boats@...
>> Subject: Re: [OMC-Boats] Forward Clutch Won't Engage on Late-1967 3-
>> wire Shifter - Update
>>
>> I was able to trace power all the way back to the stern drive so
>> its not the shifter switch or another break in electrical power.
>> At this point it doesn't appear to be something I can repair in the
>> water so we're starting to paddle. Obviously a fried coil is one
>> possibility; can anyone name any other high-probablility
>> possibilities? Thanks!
>>
>>
>> ----- Original Message -----
>> From: "ANDY PERAKES" <aperakes@...>
>> To: omc-boats@...
>> Sent: Sunday, August 16, 2009 5:15:37 PM GMT -05:00 US/Canada Eastern
>> Subject: [OMC-Boats] Forward Clutch Won't Engage on Late-1967 3-
>> wire Shifter
>>
>>
>> So once again I made the mistake of trusting someone else to ensure
>> the ski
>> line was clear of the drive and once again got a harness cable
>> wrapped
>> around the drive. Only a small ding in the prop and a slight bend
>> in the
>> shear pin (for which I had a spare and easily changed), but now my
>> forward
>> clutch won't engage (reverse work's fine). I have the late-1967 3-
>> wire
>> set-up out of the shifter, but unfortunately I can't see any more
>> than that
>> given the conditions. (I should add I'm on the water so I don't
>> not have
>> access to any manuals, limited tools, and its a bit too rocky to be
>> poking
>> around very much.) If anyone happens to see this and has any
>> thoughts I can
>> try before giving up and paddling back in, I'd sure appreciate it.
>> Even
>> though I have a 3-wire, I've already tried Lee's 5-wire trick of
>> shutting
>> down in neutral and backing in reverse; didn't work. Thanks!
>>
>> Andy
>> 1967 Reveler
>>
>> _______________________________________________ OMC-Boats mailing
>> list OMC-Boats@... http://lists.ultimate.com/mailman/listinfo/omc-boats
>>
>> Windows Live: Make it easier for your friends to see what you're up
>> to on Facebook. Find out more.
>> _______________________________________________ OMC-Boats mailing
>> list OMC-Boats@... http://lists.ultimate.com/mailman/listinfo/omc-boats
>> _______________________________________________
>> OMC-Boats mailing list
>> OMC-Boats@...
>> http://lists.ultimate.com/mailman/listinfo/omc-boats
>
> _______________________________________________
> OMC-Boats mailing list
> OMC-Boats@...
> http://lists.ultimate.com/mailman/listinfo/omc-boats
_______________________________________________
OMC-Boats mailing list
OMC-Boats@...
http://lists.ultimate.com/mailman/listinfo/omc-boats
Received on Monday, 17 August 2009
This archive was generated by hypermail 2.2.0 : Tuesday, 29 July 2014 EDT