w8ye

My Feedback: (16)

Soak it in hot but not boiling anti freeze

JB COMP

I sprayed alcohol on it and it cleaned it up. and its back together, oiled, and valves adjusted.

w8ye

My Feedback: (16)

Good job,

Enjoy

Jim

JB COMP

Ok, one more thing (I've probably said that like 20 times now) if I pull out the crank or cam, how do I put either one back in where the engine will still run? I know if the cam don't open and close the valves at the right time the engine will not run, so how do I know how to put the cam or crank in right?

JB COMP

Ok maybe I didn't word that right, or somthing.

if, well when I pull the cam shaft out how do I know how to put it back in right?

gkamysz

My Feedback: (19)

Since the topic comes up weekly it's surprising search didn't turn it up.

http://www.rcuniverse.com/forum/sear...D&sortMethod=d

JB COMP

you mean like this?

gkamysz

My Feedback: (19)

That's a Saito as the thread, surely the thread specified that.

Try this one instead.

http://www.rcuniverse.com/forum/fb.a...shaft%2Ctiming

w8ye

My Feedback: (16)

Here a picture of the cam timingNotice the dot on the cam and that it is towards the pushrod. You will have to remove the cam follower to set it.

The piston is at top dead center

JB COMP

Ok I know this is a dumb question, but how do you remove the drive washer?

and it looks like the front bearing is leaking aswell.

gkamysz

My Feedback: (19)

The drive washer just slides off. There is a key in the shaft. Some leakage at the front bearing is normal in a four stroke.

JB COMP

Thanks,

I thought the washer would just slide off, but it seems a little stuck.

JB COMP

I still can't get it off, is there any tips to getting it off?

w8ye

My Feedback: (16)

The hub is just stuck with dried castor oil or dirt.

Use a puller to get it off?

The clamp looking device is called a bearing separator. You should find it at the same automotive shop where you found the gear puller in the previous picture?

Clamp the hub with the bearing separator and then the gear puller on the bearing separator.

To take your Monokote gun and apply a little heat to the hub while you are pulling on it?

Don't loose the key if it has one?

JB COMP

Ok. Thanks

JB COMP

ok one more question. how do you get the conrod off the crank?

JB COMP

I'm trying to remove the sleeve, I got it out 35mm but can't get it out any more. I've been heating it up to about 140F and still can't get it out.

ant help on getting it the rest of the way would be great.

w8ye

My Feedback: (16)

The OS 70 has a hole in the back of the crankcase.

To get the con rod out you will have to raise the sleeve up high enough to clear this hole.

Extract the wrist pin out of the hole

Push the piston up out of the way and take the con rod off the crank

gkamysz

My Feedback: (19)

The sleeve will come out if you heat it up a little more. It usually comes out at over 100°F but some are a bit tighter. Then, follow the instructions to remove the rest.

JB COMP

Thanks, I got it.

JB COMP

Sorry to bring up an old thread, but heres for those of you that said a plane engine would fit in a truggy, well they where wrong. heres some pictures, I had to do a little tweaking to the mounts, and hopefuly get a video of it soon.

not too bad for a 14 year old. I did most of the tweaking of the mounts with files, so alot of hand work went into this.

LMK what ya'll think.

blw

My Feedback: (3)

Have you run it yet? The fuel tank looks to be sitting a bit low, but that could be the perspective of the pic.

JB COMP

Yeah, I have but the mount screws came lose and messed up the how the engines sits so I had to tweak the mounts a little and hopefully some time his week have it running and a video (to prove to those who said I couldn't do, to not underestimate me)

and the tank is where it all ways is on a CRT.

w8ye

My Feedback: (16)

That's the way it is done

JB COMP

Thanks