Evinrude 4305 Sportwin Condenser

[mike-stroz]

Looks like I need a new condenser for my Sportwin now. When it’s cool and I crank it over, it’s got a nice fat spark, but after about a minute of running it starts running rough and loses spark. Anyone know what condenser will work? Everything else seems to be good, the carb is good, and it’s pumping a lot of water.

[garry-in-michigan]

Here are the Evinrude/Elto capacitor specs. A modern capacitor is great. If you want to preserve the authentic look, the shell of the original part may be used to house the modern eqquivelent. . . 🙂

[Mumbles]

Here’s a link to Digi-Key for a modern 0.1 uF capacitor for your ’39 3.3 horse motor.

https://www.digikey.com/products/en?keywords=BC2607-ND

[mike-stroz]

Awesome! Thanks a lot!

[mike-stroz]

I decided to go with a Briggs and Stratton condenser instead of one of the others. It’s a .22uF, which I wasn’t sure would work, but I had one laying around, so I threw it in anyway. Works a treat and is a direct bolt in! I don’t have a part number to share, but they make them new and it’s made for loads of B&S engines from the 30’s through the newer 5hp flatheads.

[amuller]

If the capacitance is way off, the motor may run OK but there may be excessive metal transfer from one point to the other.

[nabmd]

Can anyone post a picture of a new Capacitor in an old ‘shell’ that Garry refers to?

[garry-in-michigan]

It would look just like the old capacitor. . . 🙂

[nabmd]

So, I’m guessing I would pull out the innards of the old condenser, clean up the inside, drill a hole in the far end and put 1 wire through to go to the mag plate where the old condenser would attach, then the other wire to the points; and use silicone gel/caulk to hold the new capacitor in place inside the old can. Should I insulate the wire to the points? Thanks for the help.

[garry-in-michigan]

You Got it – I use shrink tubing on the condenser {capacitor) wire so it is totally isolated from ground. . . 😀

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