SAITO .91 HELP!
02-10-2004 | 09:41 AM
#26
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From: Corinth, TX
RE: SAITO .91 HELP!
The guy i boght the engine from cannot find the receipt and horizon will not warranty it with out it. I have started from new several times to get this thing to run right, it seems to run fine just not enough RPM's. I have been in this hobby for almost 10 years but have never fooled with a 4-stroke. I am a AMT/MAchinist for Delta Air Lines so i have been working on engines for several years. I also have built a 91" mustang with an Incon Twin turbo system that produced 507rwhp. I took the lower end apart and it looked like the timing was off just a bit, it was hard to tell. When i pulled teh lower half up the dot was off center about 2 teeth it looked like. I have since re-assembled and re-timed on the money. Will run tonight and report back..
Keith
Keith
02-10-2004 | 09:55 AM
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RE: SAITO .91 HELP!
pohl, when observing the crankshaft from the back with the backplate removed the intake valve should close on the compression stroke when the crankpin is about 110 degrees BTDC and on the exhaust stroke both valves will be open from approx 20 degrees BTDC to about 20 degrees ATDC.
02-10-2004 | 02:46 PM
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From: Mary Esther, Florida, FL
RE: SAITO .91 HELP!
Keith:
A quick word of warning. All the gaskets in a Saito engine can be made with RTV EXCEPT the gasket for the cam shaft housing. This gasket sets the mesh for the timing gears, it has to have a thickness of about 0.005" when compressed.
If your original gasket is damaged and you do not have a new one, you can cut one from a sheet of notepaper, and use a thin coating of RTV on each side to seal it.
Bill.
A quick word of warning. All the gaskets in a Saito engine can be made with RTV EXCEPT the gasket for the cam shaft housing. This gasket sets the mesh for the timing gears, it has to have a thickness of about 0.005" when compressed.
If your original gasket is damaged and you do not have a new one, you can cut one from a sheet of notepaper, and use a thin coating of RTV on each side to seal it.
Bill.
02-10-2004 | 05:33 PM
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From: Corinth, TX
RE: SAITO .91 HELP!
WOW! Now i know what 9000 rpms are like. It must have been the timing. I just started it up and the whole engine came alive. The guy i bought this engine from, says " I was thinking about your problem and remembered i took it apart to oil it before i put it away a couple of months ago, might check the timing" Now who would take it apart to oil it and not set the timing right and then re-sell it. What a nightmare. O'well she runs good now. I have learned a lot in tinkering with my first 4-stroke.
Thanks everybody for your help.
Keith
Please read next months FLY R/C Magazine! I wrote a review in it on the Super Flea!
Thanks everybody for your help.
Keith
Please read next months FLY R/C Magazine! I wrote a review in it on the Super Flea!
