How to Rebuild Nitro Rc Engine Assembly
You will need a little bit of oil (after-run oil, multipurpose oil, etc.).,Start with the carburetor.,Take all of your small pieces and start with the barrel.,Put a small bit of oil on there and stick it back in., Replace the Barrel.,Now, take your...
Step-by-Step Guide
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Step 1: You will need a little bit of oil (after-run oil
Just do not use WD-40.,,,, Line up the channel with the screw hole.
This is the idle stop screw that will line up with the channel to keep it from pulling out too far and pushing in too far.
Put the screw in and crank it down.
Down the barrel carburetor – you want to push it in until it stops and look for a tiny ½ mm gap. ,,,, There should be a little mark that the set screw made so that you can line it up in the exact same spot.,, Take the housing and 2 washers – the fuel inlet goes in between them and screw them right into the inlet.
Be very careful when screwing this in as it is a coarse screw thread going into plastic.
You can even use your hand just to be safe.
Thread in the high speed needle until it stops, and back it out 4 stops to reset it.
That’s it for the carburetor. , Start with the crankshaft and get the rotating assembly installed.
Everything is cleaned so that there is no oil in this engine, but that is not good for running.
So when you rebuild, you have to put oil back on everything that moves, starting with the bearings.
Then put your crankshaft in., This is the most crucial step – the piston and rod assembly goes in a specific way.
If it goes in backwards, it will destroy the motor.
So make sure you see the backside is round and the front side has a little cutout and oiling hole.
So when it is sitting in the motor, it should be sitting in the front.
Slide it in through the top and slide it on.
Try not to use tools in this part – hands only – so that you don’t damage anything.,, There is a small notch on the bottom that will line up with a small pin on the top of the motor.
It will only fit that one way.
Slide it in through the top, line up the piston with the sleeve, and it should push down easily once lined up., This holds the starter shaft.
Put some oil on the back, One of the notches on the starter shaft will line up with the connecting rod.
As you put the back plate on, line up the starter shaft with the connecting rod.
On the starter shaft, the bottom is smooth and the top has 2 notches.
Make sure the notches are facing up.
If you install this upside down, it can again ruin your engine.
Push it in, and spin the starter shaft and it should fall right into place.
Screw in the back plate in a criss-cross pattern, just like you did when taking them out. ,, The cooling head fits in only one correct way. ,,, The edge of the carburetor should be right on the edge of the motor., -
Step 2: multipurpose oil
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Step 3: etc.).
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Step 4: Start with the carburetor.
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Step 5: Take all of your small pieces and start with the barrel.
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Step 6: Put a small bit of oil on there and stick it back in.
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Step 7: Replace the Barrel.
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Step 8: take your barrel spring – take your fingernail and help run it right over the lip that it attaches to.
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Step 9: Pull it over
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Step 10: hold it down
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Step 11: and run your finger around the carburetor and it should lock in place.
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Step 12: Now you can take your seal or boot which goes over all of that – get the edge of the boot over the lip for a nice
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Step 13: tight seal.
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Step 14: take your throttle arm and put it back on.
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Step 15: Tighten the set screw and it should lock in place for you.
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Step 16: Next up – the high speed needle.
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Step 17: Now go on to the engine block.
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Step 18: Take your piston and rod assembly and put a drop of oil on the top and on the big end.
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Step 19: Be patient….
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Step 20: oil the piston sleeve and replace it.
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Step 21: Now that the rotating assembly is in
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Step 22: it’s time to put the back plate back on.
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Step 23: Reinstall the Back Plate and put the starter shaft in.
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Step 24: Don’t forget the small Teflon washer!
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Step 25: Stick the head shim right on top of the cooling head.
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Step 26: Take a tool and make sure that you can get it down to the mounting hose with the notches lined up with the bolt holes.
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Step 27: Put in the five screws in a criss-cross pattern.
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Step 28: Put in your carburetor bolts
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Step 29: take your carburetor and spin it a little bit to line it up.
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Step 30: Tighten it down and there you have it!
Detailed Guide
Just do not use WD-40.,,,, Line up the channel with the screw hole.
This is the idle stop screw that will line up with the channel to keep it from pulling out too far and pushing in too far.
Put the screw in and crank it down.
Down the barrel carburetor – you want to push it in until it stops and look for a tiny ½ mm gap. ,,,, There should be a little mark that the set screw made so that you can line it up in the exact same spot.,, Take the housing and 2 washers – the fuel inlet goes in between them and screw them right into the inlet.
Be very careful when screwing this in as it is a coarse screw thread going into plastic.
You can even use your hand just to be safe.
Thread in the high speed needle until it stops, and back it out 4 stops to reset it.
That’s it for the carburetor. , Start with the crankshaft and get the rotating assembly installed.
Everything is cleaned so that there is no oil in this engine, but that is not good for running.
So when you rebuild, you have to put oil back on everything that moves, starting with the bearings.
Then put your crankshaft in., This is the most crucial step – the piston and rod assembly goes in a specific way.
If it goes in backwards, it will destroy the motor.
So make sure you see the backside is round and the front side has a little cutout and oiling hole.
So when it is sitting in the motor, it should be sitting in the front.
Slide it in through the top and slide it on.
Try not to use tools in this part – hands only – so that you don’t damage anything.,, There is a small notch on the bottom that will line up with a small pin on the top of the motor.
It will only fit that one way.
Slide it in through the top, line up the piston with the sleeve, and it should push down easily once lined up., This holds the starter shaft.
Put some oil on the back, One of the notches on the starter shaft will line up with the connecting rod.
As you put the back plate on, line up the starter shaft with the connecting rod.
On the starter shaft, the bottom is smooth and the top has 2 notches.
Make sure the notches are facing up.
If you install this upside down, it can again ruin your engine.
Push it in, and spin the starter shaft and it should fall right into place.
Screw in the back plate in a criss-cross pattern, just like you did when taking them out. ,, The cooling head fits in only one correct way. ,,, The edge of the carburetor should be right on the edge of the motor.,
About the Author
Isabella Reynolds
Specializes in breaking down complex practical skills topics into simple steps.
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