HI:
MAY BE YOU THOUGHT I WAS POSTING THE RIGHT WAY TO SEAL THOSE NASTY SLOTS IN CILYNDER, I wish i could!!

Instead, I´m asking a way to seal them. I saw a post here when somebody was about to "plug them" from the outside, but want to know if anybody have some knowledge about the pros and cons of this method or if would exist some tested procedure for that.

Please do not tell me to go to ebay, outdoordistributors or harborfreight, that would be the easy way, and since now a friend "remembered" he has no one, but two!!! lathes in the backyard at home...my engines are crying for some internal improvement.
If there is no way to acomplish this safely. i would try simply find out and buy those old cylinders with out the slots, but seems hard to find, don´t you think.

Tatolazo.

I join you in the serach for cure but not for replacing cylinder.

-ZM

Hola Tato...

Como van tus vuelos? Tato, te queda algun canopy como el que le puse a mi Extra? el mio se rompio haciendo vuelo cuchillo. Y quiero para el proximo aeropicnic de Pto Varas llevar mi Tractor 300. En caso de que lo tengas por favor dime cuanto vale, tambien quiero cambiarle el tren de aterrizaje.
Perdona la patudes , pero puse tu foto en un foro de Ryobi, seguramente te preguntaran algo..

Chao..
y cuando por ****co????????

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Sorry guys.
Hello Tato
Haw are yours flights???? Tato, do you have some canopy for my Extra 300, if you have one please tell me, and I want some land gear too.
Sorry but I put some picture of your plane with your Ryobi, churly somebody ask something to you.

By
Some pictures of Tato

As I've mentioned on this forum before, I plugged the decompression slots in my Ryobi 28cc with JB Weld after undercutting like a dentist would do for a filling. Still hanging in there after a couple dozen flights. Good for a few hundred RPM.

Sportflyer,,,, Myself and I'm sure many others are tracking your "plug the slots" experiment, please keep giving us periodic updates. Thanks !!!

I am also looking for the final results of JB weld, how long will it last?

-ZM

I dropped the Ryobi cylinder in my 1/4 scale Cub last night to check on the JB weld plugged decompression slots. It's still hanging in there OK, looks the same as when I first put it in. I haven't had a chance to fly the plane as much as I'd wished, but it did have several tank-fulls through it. The motor is down a bit (200 RPM) from what it could do in the early spring, but that might be due to the warmer, humid ambient. It still hauls the 17 pound Cub well enough that I think I'll build floats for it this winter.

Allan

Thanks for the update Sportflyer. Your continued success is tempting me to go for it ! Please keep the posts comeing !!!! Any numbers on how many rpms you gained with the mod?