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1970 Thunderhawk 1400

6. 1970 Thunderhawk 1400

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6. 1970 Thunderhawk 1400
Transom and Motor Leg - The transom height is 18-3/4 inches instead of the industry standard 20 to 22 inches, too high for a short shaft motor and too low for a long shaft motor. So, the 5 inch long motor leg spacer was shortened to 2-1/2 inches. Chrysler made a special length drive shaft for me. This positions the cavitation plate about 1/2 inch below the bottom of the keel at the transom as it should be for optimum performance. The prop is a Chrysler P273-265, 10-3/8 x 13-1/2, 3 blade, aluminum prop. With this prop, and two adults in the boat, the boat easily planes quickly and top speed is about 40 mph. I also have the original standard P293-265, 10-3/8 x 12-1/2, 3 blade, aluminum prop for it which might be more appropriate for pulling a skier. Additionally, I have a P290-265, 10-3/8 x 14-1/2, 3 blade, brass prop found on eBay which I am now too old to try. The step handle on the starboard side of the transom is visible in this photo behind this text window. When viewing in the slideshow mode press the [Tab] key to toggle the text window On/Off. You may have to click on the text window to enable the toggle function.
Posted by Kent on April 8, 2017 Full Size| Slideshow

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