Evinrude 6hp, 1972, electric troubles

[mcbun2]

Can somebody tell me which is the right tension provided by primary circuit and also which is right tension produced by coil to get spark to the plugs at this engine? Thank you. mcbun2

 

[JB]

Re: Evinrude 6hp, 1972, electric troubles

Hello, Mihai.<br /><br />Welcome to the board.<br /><br />I believe that your engine uses a dual magneto which makes no tension (voltage) except when the flywheel is installed and turning. At such times it is impossible to measure primary voltage. Spark voltage should be a 12 to 18KV spike.<br /><br />If you can tell us what is happening that makes you concerned, we may be able to help you.

 

[mcbun2]

Re: Evinrude 6hp, 1972, electric troubles

Dear JB,<br />Thank's for reply and wishes. Just I start feel confortable on board... So the story is old as the motor. I bought this engine with some modifications as follows: instead of coils inside flywheel (as I saw in the original schematic) have a normal stator and a wire (+)go to each of two external coils (probably from a motorbike ) and from those go the special cables to spark plugs. What is sure is that this sistem work well for the 2nd cyl but don,t want to work for the first (upper cyl if I know well). I changeed the condensers and breackers and nothing was happened. In my mind is now to change the coil from cyl 1 with a new one but I have to find something similar because a genuine one cannot be found arround here... In this respect I try to find the primary tension to have the possibility to buy, let say, the proper coil. <br />mcbun2<br />p.s. sorry for my english

 

[JB]

Re: Evinrude 6hp, 1972, electric troubles

Howdy Mihai.<br /><br />No need to apologize for your English. It is satisfactory.<br /><br />I can only guess what your predecessor devised for the ignition system.<br /><br />I think switching the coils is a good step. He must have retained the original magneto coils to generate a primary voltage. You might try switching them, too.<br /><br />Before anything else, I suggest that you check that one set of points is not grounded by the kill (turn off) switch.<br /><br />Maybe one or more of our fellow members has additional ideas.<br /><br />Good luck.