Reply To: Are Ruddertwin flywheels cast Iron or cast steel?

[Monte NZ]

Hi All and thanks for your replies.

Joe, with you, outboard nut and finn freeman’s suggestions, it looks like Chris Scratch is the one to contact! Your suggestions on the machining of the eccentric had been in the back of my mind…….. I have seen another Ruddertwin down country, which I think had a problem with the keyway, in that I noticed what appeared to be an insert of about 2 inches in diameter held in place by a series of cap screws……..it was a very neat job. I will go and have a closer look and take some photos, when I’m down there at Easter. Hopefully the owner wont mind  me lifting the flywheel to see what the story is regarding the eccentric. Regarding shipping deals to NZ, I don’t know of anything from Canada and as you can imagine the current costs of postage going on weight would be “mind blowing” going on what it  cost to have a 1921 Evinrude tank mailed out to another outboard collector here recently.

needtofish, I was wondering about contacting Doug……..like you said, he would have had a lot of contact with the Ruddertwins.

pmt2, thanks for your comments and suggestion too. You are correct, in that the cam is an offset circle (not an eccentric) and may I add, that I’m very sorry to hear  of your unfortunate experience of being ripped off………very embarrassing to me,  in that it was someone “down under” where I am……….very sad indeed! I can quite understand you not wanting to experience that again!

 

 

Thanks one again……much appreciated all of you and Chris.

Monte NZ

PS 1  Since receiving your posts, I contacted Chris Scratch, who was very helpful.  Basically, he felt that there wasn’t any need to get involved it metallurgy and that they cast them in what was called nickel steel, but felt that ductile iron would be successful……….he did mention too, that old rowboat motors flywheels were cast iron or what he thought was called gray iron.

PS 2 It could be an interesting project………will keep you posted.