Evinrude 1963 Bigtwin 40hp NO START

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

I have 110 on both cyl.
I started to pop the flywheel off last night. I got a harminic balancer and three 3.5" #8 1/4" bolts and started to tighten. I have reached the point where I cannot tighten anymore. I am letting it soak in WD-40 today, and trying to be patient. From what I have read, this process can take a while. I have struck the top of the threaded rod a couple times and tightened a couple of times and here I am. I will keep updating.

 

[tx1961whaler]

Re: Evinrude 1963 Bigtwin 40hp NO START

I have had to get a piece of wood and (carefully) whack it with a hammer from the underside of the flywheel to get them to pop. It helps to have the nut on loosely to keep the flywheel from flying off when it does pop.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

Yes the nut is on. Thanks for the help

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

Just a thought...
Is there a way I can verify the kill switch wires with a meter/ohm meter? I bought a momentary switch for this funtionality but I am hoping this will work. Is there a possability that either wire could have a short to ground, causing the motor not to start? Or perhaps the vacumm switch not functioning correctly.

In short; can anything in the "kill" wiring / devices malfunction and cause the motor not to start?

 

[tootallofwa]

Re: Evinrude 1963 Bigtwin 40hp NO START

Just a thought...
Is there a way I can verify the kill switch wires with a meter/ohm meter? I bought a momentary switch for this functionality but I am hoping this will work. Is there a possibility that either wire could have a short to ground, causing the motor not to start? Or perhaps the vacuum switch not functioning correctly.

In short; can anything in the "kill" wiring / devices malfunction and cause the motor not to start?

The black ignition wires each have a casing over them to protect from moving engine parts.

You can use an ohm meter for continuity testing, if you disconnect them from everything.

Disconnect from the points, disconnect them from cut out (vacuum switch), disconnect from ignition switch.
Test from one end to the other to check continuity (to be sure the wires are not broken or bad connector in the junction box.)
Then test to ground (to be sure you do not have a grounded wire.) Test each black wire that was connected to the post of the cut out. (one goes to one point set, the other the Ign. switch)
The other point set kill wire has a "knife" connector for disconnection (by the starter) and continues through to the Ign. switch

Make sure the throttle in not past the start position or the safety switch will stop the solenoid from engaging the starter. (White wire)

 

[tootallofwa]

Re: Evinrude 1963 Bigtwin 40hp NO START

oh! check the ignition switch. the M terminals should have continuity (zero ohms) only in the off position.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

This is not a marine switch. its a $8 switch from kragen. I have the kill on a separate momentary switch.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

Finally popped the flywheel and saw 2 cracked coils. I might have cracked them on accident with the puller bolts. But whatever, I'm sure these parts have never been replaced so I can work on these too.

 

[tx1961whaler]

Re: Evinrude 1963 Bigtwin 40hp NO START

Finally popped the flywheel and saw 2 cracked coils. I might have cracked them on accident with the puller bolts. But whatever, I'm sure these parts have never been replaced so I can work on these too.

Nah, you didn't crack them. They all do that after about 30 years or so.
You can get all of the ignition stuff here at Iboats...

 

[glassmaster68]

Re: Evinrude 1963 Bigtwin 40hp NO START

cracked coils suck,i got pull screws into my old coils first time i took off the flywheel also,flywheel had never been off,,,,if you still have a fuel prob when you get her firing again,,,check the gasket on the bowl of the carb,,,mine was slightly misaligned with a breathing hole and stopped it from letting air and fuel in at idle speed,causing it to only run with choke at idle and was just pulling fuel from high side instead of the low side inlets ,go ahead and replace the points and condensers and plug wires with your coils

 

[bktheking]

Re: Evinrude 1963 Bigtwin 40hp NO START

Finally popped the flywheel and saw 2 cracked coils. I might have cracked them on accident with the puller bolts. But whatever, I'm sure these parts have never been replaced so I can work on these too.

You didn't crack them, age cracked them. You have spark, but **** poor spark at that which will make matters worse. Go ahead and replace the coil and check the condition of the points surfaces, they need to shiny and clean.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

I bought new coils , condensers, and points yesterday. In about a week these will get here and I can start to work on this. All the things that will be done soon:
1: Carb rebuilt / w float
2: Tuneup, Coils, points, condenser

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

Coils, points, condensors have been replaced. Things are put back together now and I have good spark. I still have to do a carb rebuid, which will take place tomorrow. I will post more then.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

The carb has been rebuilt. It is all back together and I hate to say it, but nothing has changed.

Here are things that I know:

1. Compression on both cyl - 100
2. New coils, points, condensors
3. The plug wires are old but are not cracked.
4. Carb has been rebuilt
5. The fuel pump needs to be rebuilt but I don't think this will not stop me from getting the thing running. Fuel gets to the bowl of the carb, and the primer bulb gets hard.
6. Starting fluid makes it kick over for a second or two and makes it sound as though things should run smoothly but it will not stay running.

I am thinking this is all a fuel/air delivery problem.

I have the low speed jet turned out 1.5 turns. I have even tried it at 2 out and 2.5 out. Just for cold starts.

I want this motor to start so badly it hurts. And I'm almost at the point of not putting anymore $ into it. If anyone can be of anymore assistance, I can use it.

Thanks

 

[glassmaster68]

Re: Evinrude 1963 Bigtwin 40hp NO START

for starters,no more starting fluid,,there is no oil in it to lube your engine as it runs,use a spray bottle on stream with your 50:1 mix in it,just spray a little,,so you did get it firing?,you said you have fuel in the bowl,,youve made sure the float isnt sticking causing the float valve to stay closed,therefore no fuel at all to intake,your float is very imp,,,your fuel and airways in the carb are all clean and unrestricted ,youve checked your carb gaskets,esp the bowl gasket , if that hole from bowl to carb on the edge is not open from bowl to carb,it will cause a prob,youve correctly set your fuel/ign sync,,,,if you have fire now i think youll get it once you work out this carb prob,dont give up

 

[tx1961whaler]

Re: Evinrude 1963 Bigtwin 40hp NO START

The carb has been rebuilt. It is all back together and I hate to say it, but nothing has changed.

Here are things that I know:

1. Compression on both cyl - 100
2. New coils, points, condensors
3. The plug wires are old but are not cracked.
4. Carb has been rebuilt
5. The fuel pump needs to be rebuilt but I don't think this will not stop me from getting the thing running. Fuel gets to the bowl of the carb, and the primer bulb gets hard.
6. Starting fluid makes it kick over for a second or two and makes it sound as though things should run smoothly but it will not stay running.

I am thinking this is all a fuel/air delivery problem.

I have the low speed jet turned out 1.5 turns. I have even tried it at 2 out and 2.5 out. Just for cold starts.

I want this motor to start so badly it hurts. And I'm almost at the point of not putting anymore $ into it. If anyone can be of anymore assistance, I can use it.

Thanks

You have good compression.
You have good spark, assuming it jumped a 1/4 -3/8 inch gap with a spark tester.
That leaves the carb. Was it soaked in cleaner, and all passages blown out with compressed air? Run a soft wire through the high speed jet in the bottom of the carb bowl. How about the tiny idle passages under the Welch plug on top of the carb?

 

[tootallofwa]

Re: Evinrude 1963 Bigtwin 40hp NO START

Make sure your fuel tank is vented. Choke it till it fires. Spray fuel mix into carb throat, or try blowing propane into the carb with an unlit torch (just richens the mix.) Your plug wires are on correctly, right? Raise the fuel tank level or above the power head. GO GO GADGET!

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

You have good compression.
You have good spark, assuming it jumped a 1/4 -3/8 inch gap with a spark tester.
That leaves the carb. Was it soaked in cleaner, and all passages blown out with compressed air? Run a soft wire through the high speed jet in the bottom of the carb bowl. How about the tiny idle passages under the Welch plug on top of the carb?

The lower carb bowl was soaked in cleaner then blown out. The upper part I used spray carb cleaner and cleaned out with air. I did not run a wire through the jet yet. I will try this tonight.

I also am seeing gas in the throat of the carb. It seems to coming through the high speed jet. Its not alot but after 30 seconds of trying to start it. (not at once, but every 4 to 5 minutes with 5 second start times)

The plugs are not wet, so it does not seem to be flooding.

Tank is vented

Now I used propane, but where do I put it? in the throat? or somewhere else?

 

[tootallofwa]

Re: Evinrude 1963 Bigtwin 40hp NO START

yeah... the throat. just adding combustible fuel to the air.

 

[mottt]

Re: Evinrude 1963 Bigtwin 40hp NO START

Do I keep it going while I crank?