another wont start thread '83 evinrude 50hp

[marty53]

Hey guys-

Been working on my '83 50hp evinrude for about 2 weeks now, finally got the carbs rebuilt, rebuilt fuel pump, replaced all fuel lines.

Just can't get it to start. It has great spark on both coils, spark jumps at least a half inch gap no problem. Compression ~150psi both cylinders. I have a spray bottle of 50:1 I am spraying right into the carbs after opening the butterflies. I also tried spraying some 50:1 in the spark plug holes directly. Both methods I can get it to pop 2-3 times loudly. Primer bulb pumped hard, after 15 seconds or so of cranking I get fuel.oil coming out of prop, so I assume I'm flooding it at that point. If I pull the plugs after cranking for a while, plugs seem to be a tiny bit wet, not soaked.

I'm starting to think I have a timing issue perhaps its just sparking at the wrong time? But I'm out of my league with timing. I have not pulled the flywheel at this point.

Video of trying to start it:

 

[ondarvr]

Pull they flywheel off and check for a sheared key. Or line up top dead center on the top cylinder and see if it lines up with the timing marks.

 

[jbuote]

^^^^^ What he said.... What you describe sounds SO familiar to what I was JUST having...... So, I found TDC of #1 cyl, and the TDC flywheel mark didn't line up with the crankcase timing pointer. Got advice here to pull the flywheel.. Sure enough sheared flywheel key....

 

[175se]

Could you have possibly reversed the plug wires or coil primaries?

 

[marty53]

No Title

Ok guys I got the flywheel off, never reefed so hard on anything in my life. Had 6ft pipe on a breaker bar on the flywheel puller! Anyway, after all that effort, flywheel key looks ok to me. What to check next? 175se-. No I don't think so. Top to top bottom to bottom. Its possible something is wired wrong however, unknown history on this motor.

 

[jbuote]

Unknown history huh? Hmm... Do you have the manual and a wiring diagram for it?
​Might be worth checking the wiring then if it's unknown to you and until someone else has a better idea or suggestion...
​I'm new to outboards so I'm not sure my saying anything, beyond checking wiring, at this point would be helpful.
​I think I have a wiring diagram for that year if you don't, but a manual with it would be good.. (If you don't already have one.. LOL)

 

[marty53]

Now I'm thinking and looking at the wiring diagram, how is the coil order determined? Looks like just 2 orange wires coming from the harness from the power pack. I don't see how you determine top or bottom coil?

 

[jbuote]

Yeah... The lower right side shows the coil side has orange/orange/black&yellow and which pins they are on. (plug pin pcs..). Then the other plug pin pic shows orange/orange&blue/black&yellow..

​Just make sure the orange wire from the pin that connects to orange goes where it should, and the orange from the pin that connects to orange/blue goes to the coil it's supposed to...

​Pins are labeled a, b, and c (in the diagram anyway..)
​Hope that helps somewhat.. LOL

 

[jbuote]

To (hopefully) be a little clearer... There should be a 3 wire plug between the coils and the powerpack...
​The pin that connect orange(coil side of plug) to orange (power pack side) should go to coil #2(lower cylinder).
​The pin that connects orange(coil side) to orange/blue (power pack side) should go to coil #1(top cylinder)

​That's according to the diagram I have from my J/E manual that includes that year...
​Again, I'm new, and Again, I hope it helps...
​I know others will be FAR more helpful than myself! LOL

For what it's worth...

 

[marty53]

Yes that plug is keyed so I don't know how it could be plugged in wrong. My question is how would you know from there which coil was #1 and which is #2

 

[jbuote]

Not saying it's plugged in wrong, but that maybe the oranges on the coil side are connected backwards (or to the wrong coil),.. It's probably correct, but can you see the wire coloring or is it sealed and insulated?
​Either way, if you unplug it, look at the inside of the plug. The pins should be a triangle. with the peak at the top. Then you know A, B, and C.. The diagram will show which pin has which colored wire.. Then follow that wire to the appropriate coil..
Or,
​if you can see the wire colors at the coil side, there should be and orange and black/yellow that would be lined up (side to side at the bottom), with another orange at the "Peak" of the triangle of wires..
The "Peak" orange wire should go to top coil(#1 cyl)..
​The other orange to bottom coil (#2 cyl).

​I'm horrible at being clear so I hope you understand what I mean... lol..

 

[marty53]

Got it. Will check this I'm AM first thing. My suspicion is that's it's ok...

 

[jbuote]

Agreed that it's probably fine, but worth checking..
​From here though, I'd like to just follow along and maybe learn something myself..
​I'm new and I doubt I'd be of further help now anyway.. LOL
​As long as you don't mind... LOL

 

[jbuote]

Oh, last thing.. I think I'd wait to put the flywheel back on until other more knowledgeable folks here have advised what to check while it's already off...
​Would hate to have you put it back on just to have to pull it again later...

My 2 cents... lol

 

[juno pierrat]

before putting flywheel on, clean shaft until shiny clean, flywheel tapper and key way, don't put any grease or never-sease on shaft or flywheel when reassembling, torque to spec.
look under stator for the dreaded black goo, but you have good spark so your probable good.

 

[marty53]

Holy crap guys, if jbuote explains about the diagram is correct, my coils are installed backwards. So , my orange/blue from harness from power pack(peak of the triangle in the plug) is currently connected to the lower coil!

I'm still having trouble with how the diagram is saying this is the order however. Maybe I'm just dumb? I see how on the coil side the two orange leads are labelled B and C but I don't see where this corresponds to the two coils in the diagram, ie. They aren't labelled B and C

 

[marty53]

Can someone share a link or a scan to a wire diagram for my engine that maybe is different to what I'm looking at? Engine is '83 50hp Evinrude. E50BELCTA

 

[marty53]

No Title

Here is what I'm looking at, where I see B and C on the harness diagram, but the coils are labelled #1 and #2

 

[jbuote]

Because further up on that diagram, the lines are labeled as to which color each line is.:


​So follow the left line (orange & blue) and it becomes the top line going through the plug. now follow it right through the plug to the #1 coil..

 

[jbuote]

Here's the entire diagram I'm going off of. The coils are labeled #1 and #2, meaning Cylinder #1 and Cylinder #2. Cylinder #1 I'm told is always the top cylinder.

​Dang I hope it's that simple for you!

View attachment 82_through_85_50_hp_wiring.pdf