1972 Evinrude 40 outboard no spark?

[bcontento]

Okay so I kind of started over. Checked both of the brand new condensers and one was bad so I replaced it with one of the originals that still tested good. Check both of the coils again the proper way and one definitely has a break somewhere in the wire as it tests bad intermittently so I replaced that. New plug wires. And after a bunch of additional testing determined the Killswitch was bad so disconnected it. Had some help from a local pro to get the timing set on it and we now have good spark.

Next on the agenda is pulling the carb and rebuilding it. I have a rebuild kit on the way. Is anybody have a good diagram, instructions, how to video I can reference? I've rebuilt more than a handful of carburetors automotive and Marine but I'd rather not wing it.

Thanks again to everybody for helping along the way!

 

[saltchuckmatt]

I'm going to say you probably don't need any diagrams. Simple carb so carefully open it in a clean environment and look for the obvious.

Hopefully you have some welding torch tip cleaners or other cleaning devices. Carefully clean every orifice and spray it out.

On the top of the carb throat you will see some tiny holes. I hold the carb upside down and spray some carb cleaner in there and see if it drains.

Watch videos on how the set the float bowl correctly. Usually you bend the tabs slightly if needed to make sure the float bowl is parallel with the carb body. That's done holding the carb upside down.

Matching supplies that come with the kit are fairly routine.

If all else fails ask us individuel questions as they arrive.

 

[bcontento]

I'm going to say you probably don't need any diagrams. Simple carb so carefully open it in a clean environment and look for the obvious.

Hopefully you have some welding torch tip cleaners or other cleaning devices. Carefully clean every orifice and spray it out.

On the top of the carb throat you will see some tiny holes. I hold the carb upside down and spray some carb cleaner in there and see if it drains.

Watch videos on how the set the float bowl correctly. Usually you bend the tabs slightly if needed to make sure the float bowl is parallel with the carb body. That's done holding the carb upside down.

Matching supplies that come with the kit are fairly routine.

If all else fails ask us individuel questions as they arrive.

Great! Now, how the hell do I get the left side carb stud nut off without removing the starter?!

 

[saltchuckmatt]

Great! Now, how the hell do I get the left side carb stud nut off without removing the starter?!

You have to pull the starter and the bracket that supports it which allows access to the nut. Loosen the nuts, move the carb forward and you can spin them off the rest of the way.

Whenever I get frustrated I set my tools down and come back another time.

Good luck with your motor.

 

[racerone]

On a 72 model it might be a good idea the inspect the starter brushes any way.----But a screwdriver and hammer will take that nut off.

 

[cyclops222]

I seem to remember needing to apply a tiny coating of grease lubricant to the lobes to prevent excessive rapid wear. It was supplied with the new points.

 

[bcontento]

On a 72 model it might be a good idea the inspect the starter brushes any way.----But a screwdriver and hammer will take that nut off.

You sir are owed one large cold adult beverage! Screwdriver and a little tap tap works like a charm. Can't wait to try to get it back on lol

 

[bcontento]

Carb rebuilt and reinstalled and she's been running in a barrel for about 10 minutes pretty smoothly at a little more than idle. I've been told these motors are really lumpy at low idle.

I have the main jet at the top of the carburetor turned out two turns.

 

[racerone]

In good condition and adjusted properly the idle very nicely !----Who told you they are " lumpy" at idle.

 

[bcontento]

In good condition and adjusted properly the idle very nicely !----Who told you they are " lumpy" at idle.

The guy that helped me get over the finish line locally, 40 years experience rebuilding these motors. And when I say lumpy I Don't mean that it is horrible. It is definitely serviceable as it is unless there are some fine tuning screws I don't see somewhere

 

[Crosbyman]

top needle is for idle adjustments.... lower carb bowl has a fixed jet behind the 7/16 nut and all it needs is to be spotless.