Reply To: TN28 Lower Unit

[Ronald Smith]

Update: Well, someone said that the powerhead should just lift off, and they were right. One bold, that the manual doesn’t do a good job of pointing out, goes through the base of the tiller mount. Looked until I found it. Then the powerhead just easily lifted off. Looked in and there was the notorious SPRING. This is all done on my parts/practice TN28. I didn’t want to mess the nice one up. So, I now have the spring, the plastic disk with o-ring, and the metal washer. The spring is just big enough that doesn’t fall out when you pull the lower unit. I considered hooking on to it from below, but it is sized so that I would have had to force it past the water tube. That would have distorted it so that it might not have been reusable. It starts being fun when you have success and a break through. Yes, they will easily go in from above.

The next issue is the order. frankr’s diagram shows it below the washer. I’m not too sure about that. The spring diameter is exactly the same as the washer and plastic disk, but all three are larger than the press collar which is supposed to keep them in place. Also, the metal washer and disk fell out, but the spring stayed in place. If the spring was last, it would not have staid. Still have to sort the issue of order out.

On the near mint TN28, I have to rebuild the magneto. At a minimum I will replace the coils, and clean and gap the points. Since I also have condensers I will change those. With it tore down there is no reason not to put new plug wires on it too. At that time I will lift the powerhead and drop the seals and spring in place. You guys were great. You gave me what I needed to know to keep on going when I wanted to stop. Yea for OMCI.org.

Thanks from new boy.