Recent content by sgivanth

Etemplet the above image is with my replacement shaft installed. It wasn’t a difficult job to pullout with a correct sized socket and a m8 bolt.

Many thanks etemplet.... is the valve on the engine pic is correct then?

Can someone explain me if the attached picture looks correct??? I guess someone have used a wrong valve plate as the manual reads the duration should be 159 degrees. This one reads 172 degrees which may cause the issue for back fire.

Mechanic

If you are too concerned about getting roasted you can remove the fuel inline to the rail and place it away from the working area. Also get a wet piece of cloth and squeeze into the rail hole. Handy to have bucket of water close to where you are working. Once the fuel rail and tank out line have...

When you heat the bolt it will soften the area where retain bolt I see held. Once you pull it out the retaining nut will come off with some damage to the post. Already if the nut spinning that won't do more harm. After removing the nut needs separating from screw. After works comepleted you...

I pulled the rotary valve shaft out today. Brass wheel looks ok but maybe teeth are worn to cause free play. Also how to check injectors are leaking fuel or not on to cylinder head. What do mean by the shaft is toast? There are a plenty of YouTube videos about pulling the shaft without removing...

I have done this with some extra care. What you could do is get a wet towel and wrap around the area. Also use a small torch with slight flame. Also you can put more wet towels on top of fuel lines and other places that could get melted because of heat. You need around 2-3 mins heat on to the...

Thanks mikidymac..... I will pull it out whilst the engine on ski. I got a inspection camera to check for debris. I don’t think there will be brass shavings as the worm gear might have just worn out. Anyhow will check for any in oil out of crank case. Injectors seams to be good as I checked the...

Thanks Seadoosnipe. Yes the valve moves freely about 5mm left or right without moving the crank shaft. Can the brass gear wear out rather than breaking the gear teeth? Causing the free play? Also could this cause me no start and backfire symptoms? Sorry I’m a car mechanic but not expert on rotax...

You may have snapped the bolt retainer inside the manifold plastic. So now it just spins inside the black plastic. Only way to get it out by heating the bolt head using a gas torch and using a lock plier. after removing you may have to glue back the screw retaining nut.

I bought an GTX rfi with a wiring problem which now have sorted. Now the motor runs for 1 or 2 seconds and cuts out with a huge backfire loud from both manifold and exhaust. After investigating I found the rotary valve shaft got a free play 1/4 -1/2 of an inch (approx 5-6mm movement). Is this...