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1975 Evinrude 40555C wont run

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I am having electrical issues with this motor.  I do not have any spark that i can tell right now.  I have tried to trace the problem backwards, but everything seems to be in working order.  could i be checking anything wrong?  any suggestions?

  • Author

I found a spark now, but i found a broken keyway!!  Could this have let the flywheel spin a little so that the timing was off?

  • Author

so i am down to a fuel problem now.  the motor will run if i spray starter fluid into the carburetor.  i have good fuel pressure through the filter up to the carburetor.  where do i start looking now? 

  • Super User

You need to address the broken key way first or have you done that already?

  • Author

Key way is fixed and i have a good spark again.  I have ordered a bunch of Carb gaskets and such from CrowleyMarine.com.  They should be here on the 5-25-10 via UPS.  I disconnected the fuel line from the carb, and it squirts a lot of fluid when the motor is turned over so i feel that the fuel pump is in good working order.  I just need to get the fuel through the carb i think.  just a deep cleaning?  i have never done that before.  any suggestions?

  • Super User

Good job.

Does it still not Run? If it does then I would try some sea foam first but follow directions to the T. but if you should have to take the carbs apart for some reason I will offer some help.

Once you have the carbs removed start by removing the bowl on the bottom of the carb and flip the carb upside down and look at the float it should be level with the body if so remove the float and needle assembly by removing the small retaining pin.

Now inspect the needle for wear at the nose of the needle and if it looks like a perfect cone shape it can be reused unless your kit contains one then replace it as long as it looks the same.

the next step is to take the rest of the carb apart making sure you lay the pieces out in order check your throttle blades and shafts for wear and or damage then flush the idle ports and all of the other ports out with carb cleaner then blow them clean with air and make sure they are clear and make double sure you have saftey glasses on.

Note: Be careful with the air there are orifaces that can get damaged in some of these carbs 10 psi is plenty.

once clean and dry reassemble with all new parts and before you install the carbs make sure your complete fuel system is clean and a new fuel filter has been installed then prime and start the engine and make any nessesary adjustments.

  • Author

I finished cleaning the carb and putting the motor back together again.  i still wasn't getting any fluid to the spark plugs.  I had to put some tape over the intake which finally got the motor to start.  after it started, i was able to remove the tape and restart and run the motor.  i think i fouled out the plugs though as i can not get her started again.  she was smoking pretty bad at first which might have been a combination of the carb cleaner and rust on the cylinders (if there was any).  i plan on Jerry Riggin the steering wheel and trying her in the lake if i can get it running again later today.  i then need to reconstruct the inside of the boat.  if you have any good ideas on how to do this, please chime in.  i have another post with pictures about that topic.

thank you in advance

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