Picco wearing out

[$Revo_Racer$]

Iv'e put around 4 gallons through my picco .26 max now. I stripped out the button head?, where the glow plug goes...so I took apart the engine and it seems to have some problems.
First, the starting shaft seems to be loose. I could easily slide a piece of paper into the opening. Should I replace the starting shaft or the back plate??

Second, there is a lot of play between the flywheel and piston. I can turn the flywheel that much without it moving the piston. Is this normal or does something need to be replaced?

 

[2revo1maxx]

Time for a new engine.

 

[Zdragon71]

Sounds like theres been alot of abuse and damage done to that picco. By the time you rebuild it properly you could just buy a new one off ebay. Thats even if the block itself isnt damaged and worth trying to rebuild.

 

[$Revo_Racer$]

Yea, its just strange because it still has strong compression and a solid pinch. Hows my piston look? There's a few scars on it but it doesn't seem to affect it...

-I did wipe it dry

 

[DreamMachine]

My picco 28 has almost 11 gallons thru it, it used to be driven hard and put up wet, before I rebuilt it. If the motor has plenty of pinch left, then I would put new bearings, new conn rod and new back plate one and continue driving it. I rebuilt mine at the 4 gallon mark, my second picco was rebuilt and gallon 3 but thats because I did nothing but high speed passes with it lol

 

[Extreme RC Mods]

Like DM just said, it's normal wear on this type of engine and just needs normal maintenance. I did a quick calculation for .28 engines and found that they spin roughly 3,000,000 revolutions per gallon, the .26 would be more and at 4 gallons some of the parts do get a little worn out and need replacing.

 

[$Revo_Racer$]

Sooo I took the engine apart today and can't seem to find out specifically where all the slop is coming from but since it would cost $125+ (piston, sleeve, backplate, con-rod; new bearing $50)to repair it, Ill just run it too its death then get a new engine. Right now atleast the wear doesn't seem to really have an effect on it and it still has plenty of power!

 

[Extreme RC Mods]

It won't last long if there is that much play in it. Maybe buy a new engine and just put that piston (not rod) and sleeve in the new one, then your already done the break-in and your only using the parts that are supposed to be worn in with brand new internals.

 

[$Revo_Racer$]

Thats a good idea, and Ill have a back up new piston and sleeve then. Thanks man!

 

[Extreme RC Mods]

Before you make a decision, you don't need a new piston and sleeve when you do the rebuild, just the bearings and a new rod for internals, plus the back plate and shaft.

 

[$Revo_Racer$]

Well I figured Id just start fresh, and there seemed to be some play in the piston but maybe that could be fixed with just a new wrist pin? And there is some slight damage to the piston and sleeve, but its not very bad at all.

 

[Extreme RC Mods]

The play is almost always at the bottom bearing of the rod, I have never seen a picco with any wrist pin play, and you can't (feasibly) fix it if there was some. The choice is yours but now you can make an educated one

 

[$Revo_Racer$]

Yea! Thanks for all the help man!!! But I can kinda turn the the conrod on the wrist pin horizontally...I think ill just order a wrist pin too just cause there only $2.