😁👍

Hi. If you watch the video where I check the rpm I give the size there 😁👍 Master Airscrew 13 x 6.

Hi. Almost every chemical that I have tried makes the metal black. I use mostly Aluminum cleaning products and the trick is to keep the temperature down. The moment it goes over a specific temperature, which differs from one chemical to anotherer it goes black. I now do soda blasting to clean everything and then put it in the ultrasonic cleaner in Reverse Osmoses water, just to get the soda out of the screw threads. With this clean water It doesn't go back. 🤷‍♂️😁👍

Thanks👍

Hi. If the engine is good and has good compression the only way to increase engine rpm or speed is with a fuel with higher nitro content.

@rcaeroenginerepair we use 15% nitro, is it good enough, but have you ever tried, and got rpm above 20,000

@AzidChannelExplore 😁No

@@rcaeroenginerepair ok thanks Mr. 🙏🙏

Thanks😁

In what country are you?

No I dont. Sorry.

Thanks👍

Thanks😀👍

I think I found it, a small letter is stamped on the engine mount, mine is an “A”.

Hi. I am not sure how many models there are. At some point, I will have to make time to do the research for every model. There are just so many 😁

Finally got the cylinder bolts out, thought the hex heads were going to be stripped, but seems ok. I also heated up the carb and the gummed gunk melted and the throttle barrel came out.

Hi. Yes, the best and only way to get everything loosened up is heat. Use a heat gun going hotter a bit at a time until it loosens. I use some penetrating oil while heating it, especially on the bolts 👍

Hi. I don't know. I suppose it will differ from the prop size u use and some other factors. I will make a plan to test this someday.

Thanks👍

Thanks. It runs very nicely. Cont wait to fly it on something.

😁👍 I struggle to sell them. I think I suffer from seller's remorse.

Yes. Once tuned they start very easy. 👍

If the engine is run for the first time and it is not tuned yet it could and should run Ritch. Running very Ritch will cause it to die if the glow power is removed. Once leaned out to the correct setting it should be fine otherwise the glow plug itself has a problem.

I disassembled and removed the bearing by heating the crank at the bearing and then knocked the pin out. Just support the crank property on a piece of wood. It moves slowly but it will go. Just be patient and don't hit it too hard and it will be fine.

😁👍

Hi. Yes. The pump did not work and I had to drill the hole to make it work. It must be a factory problem. When the plane flies the pressure in the cowl changes(that is if it is not flown open like on a stick ) So if you tune the engine on the ground static the pressure inside the cowl is different from when it flies and the metering valve will work differently. Adding the nipple allows you to connect some fuel tubing or any suitable tubing, and run it through the firewall into the fuselage where the pressure will be more stable. The end can be inserted into an old pill container with holes and secured somewhere out of the way. This has solved some of my tuning problems.

Hi. To lap the pedal or reed valve could make a difference. Change the plug and check the timing. Make sure it's about 28 degrees before top dead center. It could be many things. Just try one thing at a time to eliminate the possible causes.

Hi. Sometimes the four strokes battle upside down. The type of plug and nitro content makes a difference. An onboard glow system usually solves the problem. If the engine has low compression It will also affect the low idle speed in general.

Hey, thanks!

Hi. Some oils will damage the o rings. I coat my o rings with Red Rubber Grease that protects the o rings. I purchase It from stores that sell seals and o rings. If you regularly apply some of that grease it won't damage and give off the black material. If it is not a genuine part the o ring sometimes swells from the methanol and it is difficult to move and then also shaves off the rubber as you turn the needle. I am forced sometimes to use other brands for the real stuff is just not available.

I think the LA10 up to the bigger OS engines all use the same high-speed needle o ring. I have found a local size available that works well for me.

Ah great stuff mate, yes teflon was the word i was looking for just could not remember the name of it ,i might pull it apart again to be sure ,really appreciate ya advice thanks mate and look forward to seeing more of your vids 👍👍👍

Hi. I will check and convert the ounces to milliliters and let you know.

@@rcaeroenginerepair thanks nice 1

Hi. The tank that I use holds about 300 milliliter.

Hi. I like working on the saito’s the most and the radial engines becomes complicated. I have some waiting for me to do.

@@rcaeroenginerepair nice ,looking forward to seeing you do a rebuild on 1 could you added commentary on some of ya build ??

Hi. The lapping can be difficult. If you have the bronze inserts you are ok and the damage, if any can be repaired. If it is just the aluminum-plated surface then you can only lightly clean the surface and no damage can be repaired. I experimented with different compounds and I settled on a burnishing compound they use for polishing painted surfaces. I mix in some cutting oil used by machinists. I use some fuel tubing pressed over the end of the valve to spin it between my fingers and if you pull too hard you pull it off the valve.

@@rcaeroenginerepair Thank you very much for your reply! It's very enjoyable to see you work.The music is great too!

@@rcaeroenginerepair ​ One more question if I may. Is it ok to put the valves into the US cleaner? I am not sure if you include them with the rest of the parts

Hi. I don't always show everything for the videos will be too long. Yes I put the valves in the cleaner but I put them in a small open plastic container so they can not vibrate against anything else. I do the same with the piston. 👍

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Thanks 👍

Hi. If we can get Saito bearings they would be very expensive. We just buy from a local dealer. I just give him the sample and they get it for me. It is normally commonly used sizes in mm. For cleaning liquids, I have found that most floor-cleaning fluids for tile floors work the best. Almost anything you use will turn aluminum black so you must just keep the temperature down and you will then just have to use some elbow grease.

@@rcaeroenginerepair Thank you very much for your reply!

Hi. Yes, I own and fly a Saito 180. Working on these engines the problem specific to the 180’s is that the cam warns out and falls apart. Never seen it on other Saito’s. I have seen three now with the same problem. Other than that they are fine. If you want to buy one you have to disassemble it to be sure. You have to feel the front piece of the cam if it is loose or not. The crimp in the front wares away then the front cam moves back and forth and starts to wear out. The engine will run poorly and at some stage, you will hear abnormal clicking from the cam as it jumps around. As you can see on the video I was able to fix the cams. They are very good and powerful engines. Hope you can get it.

@@rcaeroenginerepair Thank you very much for the advice, enjoyed watching your vids too ,i dont have Aircraft to put it in at moment but may as well have in the hanger as we say😁 thanks mate all the best .

@@rcaeroenginerepair what ya think should i jump on it ,now ive brought engines of him before, ie OS FS 70,s x 2 no worries to em ,it just saito more of a expencive and a experienced man to repair?? Thanks

Thanks. I will buy everything I can get my hands on.😁 Enjoy.