rexracer

Well, I put the new bearings in my .45. All went well untill I put it all back together. I'm looking for ideas to fix this problem. I don't know why, but the crankpin is hitting the backplate when I tighten the backplate. At first I thought it might be that the rear bearing wasn't seated all the way, since it isn't flush with the case, but that wasn't the problem. I pulled off the cam gear and spacer and re-installed the crank and there's plenty of room, so the cam gear and spacer are holding the crank too far back. A thicker gasket might work, maybe tripple the thickness of the stock one, or somehow shaving the length of the spacer. I guess the front bearing's inner race is either a little thicker than the original, or the bearing seated in deeper than the original. The crank hits enough to freeze up when the backplate is tightened, but it will turn, with rubbing, if I loosen the backplate screws 1/4 of a turn. Has this ever happened to anyone else?

Hobbsy

My Feedback: (102)

Are you sure the rear main bearing is bottomed out in the crankcase.

w8ye

My Feedback: (16)

My experience with this situation has been the rear main bearing is not seated.

AKFireMedic

My Feedback: (2)

Well, I suppose I expected it wouldn't get worse. I was just wondering if running the new fuel will clean it out at all or if I need to get in there and clean it manually? Any ideas?

blw

My Feedback: (3)

Do you mean that the exhaust valve itself has a lot of carbon on it and you are worried about it seating correctly?

w8ye

My Feedback: (16)

The only way to get the carbon off is to remove the valve and wire brush the carbon off.

Removing the valve is sometimes problematic in the the valve tip will be peened over and will not com out of the head without honing it off.

RPMcK

My Feedback: (1)

HI, I'm new to this site and just getting back into the Hobby (R/C Airplanes). So - reading some of the very informative and interesting post leave me with all kinds of questions.
For starters, and anyone tell me where you can buy a Cline Regulator? I have searched every why I know how on the internet and cannot come up with a sales source. Help?? Thanks.

w8ye

My Feedback: (16)

I think it is listed under Bill's room
http://www.billsroom.com/pcfs/fuelsysdesc.htm

blw

My Feedback: (3)

Bill Robison suggested soaking the cylinder upside down with, I think, acetone to dissolve the deposits. I almost suggested doing that with glow fuel overnight, and then reinspect. I'm just not 100% sure Bill was using acetone. You could also use Dawn Power Dissolver for about an hour and see if it works. I don't know about how well it would dissolve carbon deposits yet.

RPMcK

My Feedback: (1)

Thanks for the information. Took me right to the Cline web site. I just bought a Saito 180 I am planning on putting in a Giant Super Sportster. It appears the fuel tank will be a little higher than desireable. I'm hoping the regulator will solve that problem is it does turn out that way. But another question. It looks like you should be about to just turn the entire intake pipe, carb and all around 180 degrees if you needed to to get it even with the tank. Has anyone ever done that?

N1EDM

My Feedback: (2)

Hi Guys,

I missed this forum... for some reason, the updates stopped coming. Glad to see that it's still alive and well. Just getting back on here, so I've missed a lot over the past month or so.

Bill Robison used to tell about a place called RC Bearings, but I'm not sure that I have the correct website. The site that I get to seems to have its URL for sale.

Can anyone tell me if RC Bearings is still active, and what their URL is?

Thanks,

Bob

johnS555

My Feedback: (27)

RC Bearings .com

N1EDM

My Feedback: (2)

OK, got it. I was typing it in with the hyphen in the wrong place. It's http://www.rc-bearings.com/

Thanks,

Bob

We3R/C

Hi I have used a product Made by Stihl( the chainsaw company) to remove Carbon. I belive it was called EDT(It's been a while) I used it on a 4stroke and was pleased with the results. I didn't have to remove valves, just soaked for around 20hrs with ex valve open.

N1EDM

My Feedback: (2)

Hi We3R/C,

My prolblem is a little bit different. Turned my plane into a lawn dart. Buried it up to the firewall, no exageration.

Thanks for the tip on that EDT though. I wish I had known about that a few months ago when I rebuild an ancient Saito 120. Carbon city! I think I know a place that I pass on my way to work that might have Stilh products. I'll stop in there and check them out.

Bob

Michaelh

My Feedback: (4)

So anybody want to be the guinee pig? Check this stuff http://www.ferret.com.au/c/Avanti-Ch...system-n668721 Seems it has to be hot tanked but the chemicals are safe and biodegrade. Also has corrosion and rust inhibitors .

rexracer

Rear bearing was bottomed. i think the old front bearing may not have been bottomed. When I put the crank in without the cam gear and spacer, it went in all the way, so the rear bearing wasn't interfering. I wondeer if the spacer was maybe the wrong one. I took about .005" off of the spacer,and it all went back together fine. I'll run it when I get some good weather.

Ernie Misner

About the Cline regulator, is it okay to use fuel with castor in it? I understand that the YS engines can't use castor because they have a diphram, and the Cline also has a diaphram. (gets gooed up or something)

Thanks,

Ernie

AKFireMedic

My Feedback: (2)

Hmm, good info. It still has great compression so I really don't want to disassemble it just to clean it up. I might try to soak it in glow then run it and see if most of it blows out.

Hobbsy

My Feedback: (102)

Ernie, you can use castor in the Cline and in YSs as long as you run them regularly.

w8ye

My Feedback: (16)

The internal parts for the Cline can be bought at most any weed whacker/chainsaw repair shop. The Standard Walbro WAT diaphragm kit is all it takes.

Ernie Misner

Good Cline info guys. Sounds like even if you did run castor and then were going to let it sit for a while that you could run some synthetic through it right before winter sets in.

Thanks loads,

Ernie

nitrobeast

Hey guys

I broke the fuel nipple on my saito 72. I looked on horizons site but it looks like you have to buy the carb body too? Does anyone know of one i can use?

Tbone4life

Try this link.
http://www.horizonhobby.com/Products...odID=SAI30S147

Tbone4life

or this one.

http://search.horizonhobby.com/index...d=1177A93BAF7C