Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: RedRyder on August 19, 2019, 06:31:48 pm
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Please reply to your receipt information. Jin
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My pushrod assembly is on its way. This will give me time to make a rope start pulley.
Glad to see you now have something to do Gil!
crazydoug
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With the help of our Gil and a very useful Facetime phone call where we could see each other, see the problem and test fixes.
Problem seemed to be virtually NO compression. We checked the exhaust and intake valves which seemed to be working fine having removed the head to observe. Ended up taking head off, cylinder off and found the single green O ring in the groove closest to the top of the piston was barely making contact with the cylinder walls. I will order some new O rings, but short term we switched the O ring to the other/lower groove...oiled it well and reassembled. Using a bit of tape to protect the protruding crankshaft on the side without counterweights...a drill clamped on that side running in reverse got it started. We were both elated after more than 90 minutes of messing with it. We had even swapped the head from my M90 to see if it made any difference...answer NO. Problem was definitely the M91's O ring.
After running it for maybe 15 minutes total with a couple of stops and restarts...it ran quite well AND compression seemed to have been restored...maybe that O ring did not have enough oil to make a proper seal???
My thanks to Gil for his time, patience and step by step problem resolution. Funny, Gil and I have been online and phone friends for many years, but this was our first Facetime call where we got to see each other "in person" (sort of).
Thanks again Gil,
Rog
I was thinking similar re the facetime call.
You are entirely welcome and I thoroughly enjoyed the call and the opportunity to help.
Gil
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May they be straight and true for you, and make your engine run like a fine Swiss watch!
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Today I received Jin's package with a replacement crank shaft and pushrod assembly.
I have a little work to do this weekend!
[attachimg=1]
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My #18 arrived Monday, and last night i finally got to play with it. I had it running briefly, but it would not latch the exhaust valve open, so it did not hit/miss. Close inspection found that the piece that holds the roller bearing that operates the rod that opens the exhaust valve was bent in shipping, causing the roller to be at an angle to the cam and also the bearing pin to be loose and finally falling out of its bracket. The governor latching lever is also bent slightly. Once the roller worked loose and fell out, the engine quit running. I have contacted Jin for the replacement parts and am sure he will make it right.
All that said, I love the engine and can't wait to get it up and running again
crazydoug
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With the help of our Gil and a very useful Facetime phone call where we could see each other, see the problem and test fixes.
Problem seemed to be virtually NO compression. We checked the exhaust and intake valves which seemed to be working fine having removed the head to observe. Ended up taking head off, cylinder off and found the single green O ring in the groove closest to the top of the piston was barely making contact with the cylinder walls. I will order some new O rings, but short term we switched the O ring to the other/lower groove...oiled it well and reassembled. Using a bit of tape to protect the protruding crankshaft on the side without counterweights...a drill clamped on that side running in reverse got it started. We were both elated after more than 90 minutes of messing with it. We had even swapped the head from my M90 to see if it made any difference...answer NO. Problem was definitely the M91's O ring.
After running it for maybe 15 minutes total with a couple of stops and restarts...it ran quite well AND compression seemed to have been restored...maybe that O ring did not have enough oil to make a proper seal???
My thanks to Gil for his time, patience and step by step problem resolution. Funny, Gil and I have been online and phone friends for many years, but this was our first Facetime call where we got to see each other "in person" (sort of).
Thanks again Gil,
Rog
Hi, I am sorry because the cylinders and pistons use a new processing technology, and we can upgrade and replace our metal piston rings in the future. (The metal piston rings are already in processing, and new accessories will be sold in the future!)
Now only need to remove one O-ring in the piston, the piston can solve the problem with only one O-ring.
Because we found that two O-ring engines are in operation. The middle of the two O-rings is a sealed environment, they will be caught by the thermal expansion and the piston will work. So it is normal to remove an O-ring.
Jin
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Great story Rog! :D Could be the first ever "face-time model engine repair" :D
I also knew Gil for 10+ years online and finally got to meet in person last year and again a few months ago :)
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With the help of our Gil and a very useful Facetime phone call where we could see each other, see the problem and test fixes.
Problem seemed to be virtually NO compression. We checked the exhaust and intake valves which seemed to be working fine having removed the head to observe. Ended up taking head off, cylinder off and found the single green O ring in the groove closest to the top of the piston was barely making contact with the cylinder walls. I will order some new O rings, but short term we switched the O ring to the other/lower groove...oiled it well and reassembled. Using a bit of tape to protect the protruding crankshaft on the side without counterweights...a drill clamped on that side running in reverse got it started. We were both elated after more than 90 minutes of messing with it. We had even swapped the head from my M90 to see if it made any difference...answer NO. Problem was definitely the M91's O ring.
After running it for maybe 15 minutes total with a couple of stops and restarts...it ran quite well AND compression seemed to have been restored...maybe that O ring did not have enough oil to make a proper seal???
My thanks to Gil for his time, patience and step by step problem resolution. Funny, Gil and I have been online and phone friends for many years, but this was our first Facetime call where we got to see each other "in person" (sort of).
Thanks again Gil,
Rog
It is good that you both were able to converse & see each other some of the time, not so good that you had problems with a brand new engine though....but now you know the source of the problem (hopefully) & can get some high quality 0 rings to correct it. nice team work for both of you , and future forum members will at least have some answers should they come across this issue.
thanks to both of you.
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With the help of our Gil and a very useful Facetime phone call where we could see each other, see the problem and test fixes.
Problem seemed to be virtually NO compression. We checked the exhaust and intake valves which seemed to be working fine having removed the head to observe. Ended up taking head off, cylinder off and found the single green O ring in the groove closest to the top of the piston was barely making contact with the cylinder walls. I will order some new O rings, but short term we switched the O ring to the other/lower groove...oiled it well and reassembled. Using a bit of tape to protect the protruding crankshaft on the side without counterweights...a drill clamped on that side running in reverse got it started. We were both elated after more than 90 minutes of messing with it. We had even swapped the head from my M90 to see if it made any difference...answer NO. Problem was definitely the M91's O ring.
After running it for maybe 15 minutes total with a couple of stops and restarts...it ran quite well AND compression seemed to have been restored...maybe that O ring did not have enough oil to make a proper seal???
My thanks to Gil for his time, patience and step by step problem resolution. Funny, Gil and I have been online and phone friends for many years, but this was our first Facetime call where we got to see each other "in person" (sort of).
Thanks again Gil,
Rog
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Bonjour,
Please let me remind you how I started my #3 because I do not start on the "clockwise" side seen on Jins's video but Gil's one :
https://www.youtube.com/watch?v=94I3FNjDup4
Not obvious, needs somme effort.
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It’s nothing fancy Jin. I picked up a pulley wheel and cut a notch in the outside rim. I use a string with a knot to fit the slot, wrap around the pulley and with slow pull it starts very easily.
https://youtu.be/JYj_poRU1gs
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With the radiator on the right side of the engine spin the flywheel facing you in a clockwise direction. I’m running mine on lighter fluid and a touch of castor oil.
Using a string pull starter, I’m able to get 6-8 rotations of the engine and nearly perfect starting.
Can you provide a clearer picture of the starter wheel? I want to add accessories for this part.
Jin
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I have received no notification that mine is on its way, yet i see some M91s on ebay already. Did all of you who ppre-purchased a numbered M91 receive notification of it's being shipped, and if so, how were you notified?
I will contact Jin if I don't hear something soon. I checked my "spam" email as well, but nothing there.
crazydoug
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Very cool!! I hope someone makes a prairie tractor with one of these!
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With the radiator on the right side of the engine spin the flywheel facing you in a clockwise direction. I’m running mine on lighter fluid and a touch of castor oil.
Using a string pull starter, I’m able to get 6-8 rotations of the engine and nearly perfect starting.
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Rog, turn the wheel slowly until it reaches maximum compression or top dead center.
Then push the exhaust valve open with a finger on the rocker arm to relieve compression all while holding the wheel position steady.
Make sure the needle valve is open about 5/8 of a turn (these are thirstier than the M90).
Place your finger over the air intake and rotate the wheel 1/2 turn to bottom dead center to draw in fuel.
then remove your finger, wind the wheel clockwise until you are coming up on compression again.
Now grip it firmly and give a a good spin through compression. It should start after a couple turns.
Gil
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Received #6 today, but so far I have been unable to get it running. Fresh batteries, good spark, fresh fuel and spinning the counterweight equipped flywheel clockwise...but no joy.
I will mess with it some more Sat., my wrist is tired of spinning that flywheel.
Rog
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Here's a little video....
Just playing around with a generator.
Gil
https://youtu.be/cy5J6mZFdPY
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#15 arrived in California today. Needed a half turn on the needle valve and it started right up. I added a rope start to spin it up and make starting easy. I’ll have to post a video of it..... ;)
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Bonjour Rog,
Christmas on August in Indiana ;D ?
Results of your first run welcome, I hope you have some grip ;)
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Picked up my M91 at the post office this morning...busy today, but will open box and gaze upon the beauty of it all tonite.
Rog
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Getting close, Rog!
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Missed the postman by 18 minutes today...since my M91 engine must be signed for, it was not left and I have to go to post office tomorrow to claim it. Nuisance, but what can one do.
Rog
At least it's not being picked up off of a friend's lawn five miles away, like some of your deliveries have been known to happen!
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Mine is siting 15 minutes away at another postal facility, will still have to make the trip to my local post office
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#10 showed up this week while we were away in New Mexico/Colorado. We arrived home and I opened the package. In perfect condition. I will not be able to run it until next week. Can’t wait!
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Number 8 (I think as the penmanship is a little stilted) showed up late today - looking forward to trying it out tomorrow.
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Missed the postman by 18 minutes today...since my M91 engine must be signed for, it was not left and I have to go to post office tomorrow to claim it. Nuisance, but what can one do.
Rog
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Bonjour,
My engine came with the same process.
Little "detail", when I received it, the postman asked me 35,00 € for administrative fees and customs fees based on a declared value by Jin of 50, 00 $ :(
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Seems my order is still in China where "origin country is preparing shipment"....that was Aug. 16th...last in a string of shipment updates. That must be a well prepared shipment!!!
Rog
Mine played out in as similar manner. After the updates re origin post, i heard nothing until it landed in NY. The next day it was delivered.
Finally, some movement....seems the plane has landed in US and engine had cleared customs:
2019-08-21 10:39
Inbound Out of Customs -> Your item cleared United States Customs at 10:39 am on August 21, 2019.
2019-08-16 23:40
Origin Post is Preparing Shipment
2019-08-16 23:40
CHINA, GUANGZHOU EMS, Processed Through Facility
2019-08-16 23:21
CHINA, GUANGZHOU EMS, Processed Through Facility
2019-08-16 19:06
CHINA, Acceptance
Rog
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Seems my order is still in China where "origin country is preparing shipment"....that was Aug. 16th...last in a string of shipment updates. That must be a well prepared shipment!!!
Rog
Mine played out in as similar manner. After the updates re origin post, i heard nothing until it landed in NY. The next day it was delivered.
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Seems my order is still in China where "origin country is preparing shipment"....that was Aug. 16th...last in a string of shipment updates. That must be a well prepared shipment!!!
Rog
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Look pretty nice might just have to get one.
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These are pretty cool.
I generally prefer to build my own engines, but with shop time almost non-existent this is an interesting option.
Thanks for posting the video.
Scott
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Hi,
I am very glad that you can start the vertical engine normally.
I am sorry because I am not sure what happened during the transportation, but I will provide you with new accessories again. 😊
Jin, please check your inbox, I've sent you a PM. Thanks
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They run very nicely Gil...crankshaft bend is a nuisance, but as you point out, Jin will make that right. They really are a handsome engine, I love the look and functionality.
Rog
Jin has already provided me the tracking number for the replacement part!
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Lovely additions.
Congrats Gil !!!
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Those are very nice looking - they look better than expected. Love the videos. What direction do the engines run? Jin’s video looks like he started his in a clockwise rotation with the radiator facing to the left. It looked like you were working to start yours spinning the engine clockwise with the radiator facing to the right.
One other question - when did your two engines actually ship?
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Hi,
I am very glad that you can start the vertical engine normally.
I am sorry because I am not sure what happened during the transportation, but I will provide you with new accessories again. 😊
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VERY nice Gil , they are certainly a handsome engine & pair well with the horizontal engine 😊
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They run very nicely Gil...crankshaft bend is a nuisance, but as you point out, Jin will make that right. They really are a handsome engine, I love the look and functionality.
Rog
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Great looking engines Gil - you've got a special pair there.
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Way COOL Gil .... just like a kid in a candy shop!
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Here they are....
The first 2 of the first production run of the new M91 from Jin.
They look great and run great. Only issue is one has a bent crank so a flywheel wobbles.
I am pretty certain Jin will make it right.
Here's a little video.
Enjoy,
Gil
https://youtu.be/6NxmAKmtib8