What’s the best practice of fastening the engine to the mounting so the engine won’t move due to vibration.
My last setup was:
Bolt
|
Engine lug
|
Aluminum pads
|
Hardwood Engine Bearer
|
Locknut
I’ve got:
- [ ] Flat washers
- [ ] Spring washers
- [ ] Steel nut (normal nut)
- [ ] Locknut
Looking forward to hearing more from you!
This is on a through hole (like a profile)? You have a (presumably thick/hard) aluminum pad under the engine, but I think you need something to spread the load on the other side of the mount. The reason they come loose in these situations is that the wood compresses, so you can have all the jamnut/locknuts in the world, and it still comes loose.
You also show no doublers over the hardwood mount - presumably you do have those. That is the usual part to collapse/compress and make it come loose. At the very least, you want a flat washer between the nut and the wood, the aluminum doubler is far better.
The net assembly has to be stiff enough that you can count on slightly stretching the mount bolts, so that you have some positive pressure pulling it all together. If the wood compresses, it usually says compressed. It also depends on *which* hardwood you have, you need something at least as hard as sugar maple ("rock maple"), which means sugar maple or some exotic wood like cocobolo, etc. (which are typically difficult to glue since some of them are pretty oily).
Brett