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Here is what I am using on my Yamato 302. After soldering the wires & diodes these are inserted into a short plastic hose then epoxy is poured into the hose to seal everything from water. Very...

The trial run today was very good. RPM is now up at 7,800. I think that's the most I want out of this, for now. Had to cut 1" off the pipe and advance the ignition timing a little. Proceeding very...

Yes I wanted one of those dynos (Land & Sea for example) but I have no idea what's inside so I could not make one. What type of transducer is used?

So I was hoping to make a simple test wheel...

Thanks guys, I do have Blair's book and have read at great lengths also. Will let you know how it turns out this weekend.


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Thanks. Not so many people into this over here so I have no one to ask.

Since it's a home-made pipe I anticipate it will take several iterations to arrive at the optimum.length & stinger diameter,...

Hmmm, so even oil ratios are secret too? C'mon!!!!

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I wanted a simple megaphone but it ended up looking like this:

I'm shooting for 7,500rpm or maybe a little bit higher. Do I need to add more oil at this rpm level? Now at 30:1 using Seadoo XPS.
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I was about to put on some thread lock adhesive to make sure it stays in place! So just plain torque only according to the manual.

Thanks!

I was going ~54mph when this whirring sound started and so I shut off the engine. I then restarted and the engine ran but the boat was no longer moving so I paddled back to shore.

Upon inspection...