Forum Replies Created
July 29, 2021 at 9:17 pm #243930
Probably overkill, but here’s my flywheel puller plateJuly 29, 2021 at 9:14 pm #243929
I think it was just sketchy ignition, visual signs seemed to point that direction. Good to know about the crankcase drain thou, I’ll touch it if I get a reason to do something with the carb. Still learning how to work these models, ran a 1958 Johnson 18hp that gpa worked on when I was a kid but wasn’t allowed to wrench on it. I’m using this one for practice 😉 Plan on rehabbing the 58 this winter.July 28, 2021 at 7:27 pm #243824
Just wanted to wrap up this thread, I took boat out yesterday and ran very well… mostly putting around at low speed to fish/troll for a few hours. Fouling/noSpark issue on bottom cylinder gone. Think it’s slow speed is better than I’ve had it before. Tick tick tick about 1mph.
Mission accomplished. New cdi coil, new plug wires, new plugs, and points timed off marks with multimeter.July 25, 2021 at 3:16 pm #243634
I think it’s just a matter of how fast I could turn the flywheel by hand. The German coil sparks turning by hand. I put the recoil rope on and the CDI does spark it just requires more speed. I went ahead ran new wires, adjusted points and gonna put it back togetherJuly 24, 2021 at 11:24 pm #243598
Had to deal with a few other projects, but back at this one.
I’ve pulled the flywheel, it has one newer German coil. Meter reads out 1.5/6.5k and is the top cylinder coil which has no problems.The other coil has an outlined M on it, looks older, fabric sheathed wires, no obvious cracks. It tests out 1.5 on primary and secondary 9/10 times doesn’t register but I can scratch on the wire pin and very inconsistently get a read out of 3.5k.
I did buy 2 new coils (cdi brand 183-4477) and used 1 to replace the bad coil and the new coil doesn’t spark. Both New cdi coils read out with 1.5/8.3k with multimeter so it seems it should work? I swapped the top/bottom coils and the German coil which was on top now successfully fires the bottom plug. I bought 2 just in case 1 was bad so I’ll try the other new cdi coil tomorrow. Skeptical thou? The laminations are definitely shorter, the leg going thru the windings is smaller. Seems like others have success with this model coil thou? Am I missing something?June 10, 2021 at 9:33 pm #239940
Yes, both coils look pretty new and identical. Almost all the wiring inside looks new… except the one fabric covered wire from one of the coils.
The spark plug wires do “look” oldish…. whatever that means… they have a bunch of nicks on them, no real writing of any kind, and oxidized. I tend to not want to replace something especially if expect it to be working…. I don’t know that I want to just go replacing coils/condensers/etc given that they all look new and don’t know they are actually broke…. althou maybe the plug wires and one coil wire that look 60 years old are due for updating?
No I don’t have an OMC specific flywheel puller, thought I could retrofit one of my pullers to bolt into the three bolts and pull against the center flywheel bolt…. the “old outboard” book I have talks about pulling up on the flywheel with hand while tapping on center puller applying some pressure on it. Book has some OMC/Evinrude service bulletins in it with 60s style helpful pictures along with tips on handling the flywheel key on reinstall.
On the throttle cam, the way you explained it is what I now understand, there were some early comments I saw about it having to do something with where “start” is on the handle. Sounds like it currently is running a bit rich off idle, not by much but is some. I can see that the butterfly shaft does start turning before the mark bisects the roller.
Hard to get good pictures of some of the dark areas with the phone… the bite out of the spark plug wire does look pretty decent where it rubs and yes it looks difficult to prevent it from rubbing… there doesn’t seem to be much clearance where it needs to come out of the plate at an angle and make the turn going down at WOT. The little plastic wire covers crosbyman has in his attachments look pretty effective thou?
In other thoughts, checking the bleeder looks like I need to pull the entire carb off…there a gasket around this that will need replacing or carefully pulling can be reused? I suspicion looking at this….June 9, 2021 at 9:46 pm #239862
Other commentary…. I think I now understand how the cam roller works with the throttle. I don’t have a indicator band on the handle so hard to know “where” start is supposed to be, but I did look thru a book I bought of “cheap outboards” which has a good diagram/explanation of this…. currently by the time the roller hits the indicator the throttle plate inside the carb has already moved a bit, and not the book explanation of that the roller should be at indicator when the slack in the linkage just starts to turn the carb plate open.
So, sounds like the carb is opening a little sooner than expected at the indicator, any ideas how this would make the motor behave at this timing? Would adjusting it back some make it idle even better?
June 9, 2021 at 9:37 pm #239857
- This reply was modified 1 year, 2 months ago by andreaskc.
Finally coaxed the flywheel inspection bolts off without stripping them tonight. Few initial findings…..
Coils not cracked
Coil/Points/Condensers all look very clean/shiny
One of the coils still has a fabric coated wire connected to the points and looks slightly frail at the coil connection. The other coil has a nice heatshrunk plastic coated wire with modern writing on it.
Observing the spark plug wires as they move when throttle is advanced to wide open shows that both wires, but especially the bottom cylinder wire is chafing against an exterior metal support and has made a significant dent into the plug wire…. not enough to show internal wire, but looks problematic.
I think my plan is now to pull the flywheel, replace the solo fabric sheathed wire from coil to point and run new plug wires trying to avoid them from making physical contact with metal frame as they are advanced.June 8, 2021 at 7:31 pm #239739
Thanks, haven’t seen one of those neon testers before and I’ll pick one up. I’ll take the recoil off tonight and have a look, I’m curious if the “tune-up” or any “tune-up” ever replaced the coils. We ran about 30 gallons of gas thru the motor in 3 weeks of vacation, so it was working pretty darn well… until half-way thru the last batch of different gas mix (see original post)… wasn’t sure if it was coincidence or not.
Fuel pump is in the top bypass, intake looks like it hasn’t been removed in decades. I suspect the recent tune-up was a carb clean, plugs, some rickety fuel pump change and lower unit gear oil.
I did order a few J8C plugs to try? Also wondering if I should try decarbing the engine. Going back to the lake in two weeks and trying to button up any issues so we can fish the heck out of this boat again.