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Thank you for posting this video. I have been told that this boat, with a stock piston/sleeve went 93.8 mph in Cincy.

The world wide demand for 67 and 80 size engines really does not justify the investment. There is so much initial ivestment that has to be recovered in the engine's sale price. The most popular engines sizes worldwide are the 21 and the 45. Then comes the 90. To pay for the 21, I need to...

Doctor says another 6 to 8 weeks before I can get around well.

Depending on demand for the K21 and the K45, I hope to follow up with a .90 size engine. So much of the initial investment, spent before any engines are available, has to be spread out over the sales of many engines. The material and manufacturing quality available to me is excellent. I am...

Yes

Yes. I have received matched pistons and brass sleeves for the K45.

K45 engines are now available for sale. $385.00 plus shipping. The engine comes without a carb. These engines are available from Stumpfab, Double Ace R/C, or direct.

Be patient. We are still doing some testing. I hope to have them available to Christmas shopers.

Congratulations Doug and Buckshot!

Looks good to me.

After further planning, you can select a K45 with an aluminum sleeve or a K45 with a brass sleeve. The aluminum sleeve engines are available right away. The brass sleeves are available, but I have to switch the piston/sleeves. As I am laid up for a few weeks, there will be a delay for the K45...

K45 engines are back in stock. A limited number will come with two liners, an aluminum liner and a brass liner at no exra cost. Price is still $385 with no carb, plus $15.00 for shipping. Al Hobbs

It turns out that I will not be in Huntsville. I blew one of my wheels and the Dr. is putting me back together. Buckshot and Doug Twaits will be running new K21 engines in the 20 rigger class. Hopefully they will show you what this engine can do.

I am currently out of K45 engines. They have been selling very well. I have ordered another factory run and will let you know when I have more.

Yes, I am putting one in a Seaducer. And, I'll have one or two K21 engines on hand for those who wish to fondle....

I love it! This hobby has introduced me to my best friends, taken me around the world, and given me the best of times. I'll never be able to give the hobby back equal to what it has given me.

Here are a few more photos. The crankcase and inner parts were clean, no flash, no chafe inside the case. The engine comes with two hed buttons, one for a standard glow plug and one for a cone lock plug. The engine also comes with a cable collet to fit the flywheel. A K21 engine was test...

We'll see after the testing is completed. It may mean an adapter plate so you can use the carb you like.

I'll put more info out after some tests. Something might need to be changed.

K21 Rotor and backplate.