ORIGINAL: Sharksj
Hi. I have an extra 300 With a Saito 100.
When I try to start it sometime the metal spinner spins and not the engine part.
The back part of the spinner is metal and the engine is metal.
Am I missing a pice in between them or it's just not tight enough?
Thank you very much.
There are a number of things that can cause this to happen.
Some are:
1. If the spinner / prop nut is one that the prop nut screws onto the shaft while going into the prop hole, sometimes the nut runs out of thread and will not tighten adequately. An extra washer or two between nut head and prop usually corrects.
EDITED to add: In some cases I have had a regular propnut run out of shaft thread prior to getting tight. Usually happens when using thin base LOW pitch props. Again another washer/s will fix.
2. Not tight enough, but check for #1 above.
3. THE BIGGIE!. Aluminum spinner backplates just don't like thrust washers getting all cozied up.
Take a small square or round of wet/dry sandpaper, 150-320 grit or about. Cut a whole about the size of the propshaft. Slide it over the propshaft and place between the thrust washer and the spinner backplate with grit against the backplate.
You will be very surprised with the results. No more slipping backplate.
BTW this can be done rather sloppy or fine tooled. Sloppy works well.
No big deal.