Author Topic: Saito front bearing question.. (Read 2553 times)

Joe Yau · « **on:** April 07, 2011, 12:31:14 PM »

I have a Saito .56 CL engine that I removed from a stunter, cause I was getting some odd inconsistent runs. After I put the after-run oil in to stored it away with crankshaft down. I notice on the next day.. almost all the oil has drained back out through the front bearing. Is that normal or the seal has gone bad? I thought the front bearing was suppose to be sealed.

Bob Reeves · « **Reply #1 on:** April 08, 2011, 05:16:00 AM »

Personally, as long as the bearing feels OK I wouldn't worry about it. 4 strokes don't depend on crank case pressure like two strokes and it won't cause any run issues. I don't like taking engines apart unless it is a must do and in this case I don't see a problem. The oil could have leaked out the breather but in any case as long as the bearing is OK I would just run it..

Joe Yau · « **Reply #2 on:** April 10, 2011, 10:42:27 AM »

Quote from: Bob Reeves on April 08, 2011, 05:16:00 AM

Personally, as long as the bearing feels OK I wouldn't worry about it. 4 strokes don't depend on crank case pressure like two strokes and it won't cause any run issues. I don't like taking engines apart unless it is a must do and in this case I don't see a problem. The oil could have leaked out the breather but in any case as long as the bearing is OK I would just run it..

Thanks Bob.

The bearing seems fine, and the breather was plugged. I think the run issue is probably not enough prop loading with a 12" 3-blade.. and there's no ground clearance for 13" dia.

Bob Reeves · « **Reply #3 on:** April 10, 2011, 11:22:30 AM »

Bend longer landing gear.. That is what I did on my Score..

Douglas Ames · « **Reply #4 on:** April 13, 2011, 03:24:23 AM »

Quote from: Joe Yau on April 10, 2011, 10:42:27 AM

...and the breather was plugged. // ...I was getting some odd inconsistent runs.

Were you running it with a plugged breather? (...or did you just store it that way?)
That would explain your blow-bye and "odd runs" due to excessive C/C pressure.

Joe Yau · « **Reply #5 on:** April 13, 2011, 12:57:18 PM »

Quote from: Douglas Ames on April 13, 2011, 03:24:23 AM

Were you running it with a plugged breather? (...or did you just store it that way?)
That would explain your blow-bye and "odd runs" due to excessive C/C pressure.

I just stored it that way.. basically to see if the After-run oil was coming out from there, it obviously was not. It also explains why the spinner had so much oil in it, and I notice that every time I take it to the field.. from storing the plane nose down.

Author Topic: Saito front bearing question.. (Read 2553 times)

Joe Yau

Saito front bearing question..

Bob Reeves

Re: Saito front bearing question..

Joe Yau

Re: Saito front bearing question..

Bob Reeves

Re: Saito front bearing question..

Douglas Ames

Re: Saito front bearing question..

Joe Yau

Re: Saito front bearing question..