Home › Forum › Ask A Member › New to me Rudder Twin J
- This topic has 22 replies, 5 voices, and was last updated 1 month, 2 weeks ago by
Tubs.
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March 19, 2026 at 10:59 pm #310617
OOOOOOHHHHHHH!!!! I get it now! You’re only supposed to bump compression to the left, but the engine will fire while the piston is past TDC and start running CLOCKWISE.
“It is never necessary to crank motor over compression”
Makes sense now. THANKS A LOT!! That was very helpful!!!
–Rob
Rob
March 20, 2026 at 9:03 am #310751The videos on the timer do not open for me.
March 20, 2026 at 9:34 am #310754
I tried to post the 2 links John. They went poof . I’ll try posting them separately. #1 https://youtu.be/fSqQE4CWe34
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
March 20, 2026 at 9:40 am #310755.

#2 https://youtu.be/zLS6IglCy9k
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
March 20, 2026 at 10:20 am #310761
OOOOOOHHHHHHH!!!! I get it now! You’re only supposed to bump compression to the left, but the engine will fire while the piston is past TDC and start running CLOCKWISE.
“It is never necessary to crank motor over compression”
Makes sense now. THANKS A LOT!! That was very helpful!!!
–Rob
You’re close. You want the plugs to fire exactly when you let go of the knob. You let go of the knob where you get the best bounce. When the motor starts it will be running with the spark happening at past TDC. But the spark happens before TDC on your starting swing, the plugs fire, the flywheel change the direction your spinning it, and the motor keeps running forward. Try this. Turn the flywheel clockwise till it stops as compression begins. Now slowly bring it back counterclockwise, listen for a snap. That’s is the points making contact to fire the plugs. You want that “snap” to happen just when you’re letting go of the knob. If you go back to the video of me starting mine, I may have had the timer too far to the left, and the points weren’t “snapping” and I wasn’t getting spark. When I moved the timer slightly to the right it took right off.
There is no air control on the early motors. If they had carburetor it would be wide open all the time. The speed is controlled solely by the timing. Slow – the points fire past TDC. As you advance the timing to TDC, and beyond, the motor runs faster. Once you go past the point where its increasing in speed, bring the timer back a tad. That’s full speed. Any more and your over advanced.
Edit – I was think other Super Eltos. Because of the gas tank you cant over advance a Ruddertwin.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
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March 20, 2026 at 11:38 am #310753
I’m going to try to post the 2 links John. If this goes poof I’ll have to post them separately.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
March 21, 2026 at 10:05 am #310992Tubs, I posted a thank you reply and it also vanished, so I will again say thank you the videos now work.
March 21, 2026 at 10:13 pm #311191
That’s good that they worked for you, and thanks for taking the time to let me know. Its a really interesting ignition. And it work well too. Once I’ve cleaned the assembly, and replaced the bushing in most of them, I have never had to do anything more to them. A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
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March 22, 2026 at 9:15 am #311303Just looking through the holes in the flywheel, and seeing the condition of the wires, I am sure my ignition system needs some attention.
Could someone on here please give me some ponters on removing the flywheel without damaging it?
THANKS!
—Rob
Rob
March 22, 2026 at 9:51 am #311316
Get 2 nuts and a bolt. Tighten the nuts against each other . Its important to be lifting up on the flywheel and the tool remains tight. Video Link – https://youtu.be/RWgE9XiIBnk?si=OWRQKqmTPazplPCR
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.
1 user thanked author for this post.
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