I agree. I'm not sure they even designed motors that small to take controls, although you could certainly cobble something together. I agree that a tiller extension might do the trick and only cost about $5. It certainly helps in my 14' tinny. It allows me to move forward 6"-12", which doesn't sound like much, but makes a huge difference in getting on plane, etc... Here's one I made for my '66 20hp. It's made from thin-walled 1-1/4" PVC, and end cap (optional) and a couple of pipe clamps. The trick is to cut a 4-5, 12"-18" slits in one end. Be sure to drill a small hole at the end of each slit to prevent further splitting. You can even use a heat gun to soften the PVC a bit to get an even more molded form, but I wasn't necessary on mine.
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