What kind of aluminum spinner to use with engines with this kind of propeller fixing system ?

Thank you.

This kind:

http://www.shopatron.com/products/ca...161.5188.0.0.0

I would have to respectfully disagree just a bit. I wouldn't suggest a plastic spinner with a gas engine.

That would usually be the case, but that's a tiny gasser. But if that bothers you, there are other options. I will explain, but I think you'll see why the plastic spinner will be a much easier route.

First, you'll need a lathe (See?). Get a hex head bolt whatever size the prop bolt is and drill and tap a hole in the head so you can screw an aluminum spinner into it.

Or, find a stud (or grind the head off of a long bolt) and find an adapter that will fit that size stud to the screw from an aluminum spinner.

much easyer than that, just call tru-turn or email www.tru-turn.com or Dave brown products www.dbproducts.com and get a center drilled and tapped bolt, just tell them what engine and size you need.

most mfg. produce a center driled bolt for there engines so you can use a aluminum spinner, I am not too keen on using a plastic spinner on 4strokes or gas engines.

with gas engines its less critical because most times you don't need a electric starter to get them going, they just flip and rip

I run them all the time with 26cc engines... no problems what-so-ever... and I even use an electric starter on them...

Yea, nylon spinners have gotten a bad reputation for breaking, and I have even seen a few break, but it's rare and often the cause is failure to properly enlarge the prop hole (I even saw one guy who used a hacksaw).

But I have used them on 4-strokes and small gassers for many years without a single incident.

Of those I've seen break, it has usually been because of the prop blades pressing the back plate backward stressing it.

Usually this is because of the use of the wrong spinnner size, poor hub pressure distribution, or improperly cut blade holes.

I've seen an equal number of aluminum spinners break for the very same reasons though....

One guy was complaining about having to crank the spinner screws down, because they kept getting loose...
On a startup attempt the aluminum spinner shattered.

It turned out he had incorrectly installed the prop nut and pressure washer.... so when he attempted to tighten the prop nut, it was bending the spinner back plate back, which caused it to crack then fracture...

That's a pretty plane, Opjose. What's a "Marathon", anyway? I thought it was some kind of running contest.

Tru-Turn.