Looks easy enough. I know if a GM diesel engine (2-cycle) backfires it can run on the hot engine oil as a fuel source which can provide a bit of excitement. Good demonstration. Thanks.
Yes, I'm still here. :-) Not an easy question to answer... especially with the particular model engine in this video, where you can't see the cams anyway. What we are more interested in is the action of the exhaust valve. Watch this video where the operation of a 4-cycle engine is explained. Eachine ET1 Upgraded Hit & Miss Engine th-cam.com/video/ZCrjj4niyto/w-d-xo.html The exhaust valve needs to be closed during the compression and power stroke... then the video gives you an idea of about when the exhaust valves opens... leading up to the exhaust stroke. The particular engine in this video has both intake and exhaust valve pushrods. Some other engines only have an exhaust valve push rod as the intake valve is operated by atmospheric differential pressure created by the downward travel of the piston during the intake stroke. If for some reason your engine has been disassembled and the position of the cam has been changed... it will take you some time to play around with the position to get the engine exhaust valve back into time with the piston positions. Keep in mind that the engine turns over twice for each complete 4-cycles of the piston... and the cam is a 2:1 reduction by the gears. The following also has an animation and diagrams of the 4-cycles. en.wikipedia.org/wiki/Four-stroke_engine Hope that helps... if not ask again and tell me specifically which engine you have. Thanks for watching. Please subscribe! That is what keeps this channel going. Ron
Thank you for another great video ! All these engines are fascinating ... May I ask if you purchased, or even reviewed the Microcosm M18 engine yet ? Would it be a user-friendly model, or mostly for skilled modelists ? ... ;-) Thank you !
Not yet! It does not appear the M18 will be sold by Banggood.com, at least not at this time. I cannot comment on the M18 as I have not seen it run for more than a few seconds. I will review a similar engine, the EM2 which has a flying ball governor... but no water cooling. That review will be a month or so away.
@@RonaldWalters2010 Thank you Ron ; well it appears the M18 is a pretty new model ! :-) So perhaps there is a small delay before Banggood are allowed to sell it ? Greetings,
You’re pretty much screwed… throw it away and buy a new one. :-) But seriously… watch this video on the ET1. All of the hit & miss engines are basically the same. Eachine ET1 Upgraded Hit & Miss Engine th-cam.com/video/ZCrjj4niyto/w-d-xo.html I go through the operational sequence of a 4-cycle engine. Around 3:04 you can see the exhaust valve opening just prior to the piston reaching BDC (bottom dead center) of the power stroke. From that you should be able to time your engine. Do not over-tighten that set screw… you do not want to strip the threads. Thanks for watching, Please Subscribe! That is what keeps this channel running. Ron
Early on with the ET1 (M90) sometimes the engine would quit and there was no spark. It was discovered (actually by a friend of mine) reducing the voltage from 4.5 VDC to 3 VDC seems to fix the over-voltage problems, if the problem exists. This is accomplished by using two batteries instead of three. The problem is occasional and inconsistent between engines. Not every engine ignition system experiences this. I usually try using only two batteries plus a dummy first to see if it will run. If not, then I use all three batteries. I have a video on making the dummy battery. It is explained there. Dummy Battery For Hit & Miss Engines Some of the later engines will not run on 3VDC and all three batteries are required. That's just the way it is. Call it inconsistency of components used in the ignition systems??? I know some people have purchased new ignition systems but I do not know if the original actually had a problem or not.
Looks easy enough. I know if a GM diesel engine (2-cycle) backfires it can run on the hot engine oil as a fuel source which can provide a bit of excitement. Good demonstration. Thanks.
if you are still reading replies Ronald, could you tell me what position the camshaft should be in at TDC? many thanks
Yes, I'm still here. :-)
Not an easy question to answer... especially with the particular model engine in this video, where you can't see the cams anyway.
What we are more interested in is the action of the exhaust valve.
Watch this video where the operation of a 4-cycle engine is explained.
Eachine ET1 Upgraded Hit & Miss Engine
th-cam.com/video/ZCrjj4niyto/w-d-xo.html
The exhaust valve needs to be closed during the compression and power stroke... then the video gives you an idea of about when the exhaust valves opens... leading up to the exhaust stroke.
The particular engine in this video has both intake and exhaust valve pushrods.
Some other engines only have an exhaust valve push rod as the intake valve is operated by atmospheric differential pressure created by the downward travel of the piston during the intake stroke.
If for some reason your engine has been disassembled and the position of the cam has been changed... it will take you some time to play around with the position to get the engine exhaust valve back into time with the piston positions.
Keep in mind that the engine turns over twice for each complete 4-cycles of the piston... and the cam is a 2:1 reduction by the gears.
The following also has an animation and diagrams of the 4-cycles.
en.wikipedia.org/wiki/Four-stroke_engine
Hope that helps... if not ask again and tell me specifically which engine you have.
Thanks for watching. Please subscribe!
That is what keeps this channel going.
Ron
Thank you for another great video !
All these engines are fascinating ...
May I ask if you purchased, or even reviewed the Microcosm M18 engine yet ?
Would it be a user-friendly model, or mostly for skilled modelists ? ...
;-)
Thank you !
Not yet! It does not appear the M18 will be sold by Banggood.com, at least not at this time. I cannot comment on the M18 as I have not seen it run for more than a few seconds.
I will review a similar engine, the EM2 which has a flying ball governor... but no water cooling. That review will be a month or so away.
@@RonaldWalters2010 Thank you Ron ; well it appears the M18 is a pretty new model ! :-)
So perhaps there is a small delay before Banggood are allowed to sell it ?
Greetings,
My cam gear set screw came out.How do you time the valves?
You’re pretty much screwed… throw it away and buy a new one. :-)
But seriously… watch this video on the ET1. All of the hit & miss engines are basically the same. Eachine ET1 Upgraded Hit & Miss Engine th-cam.com/video/ZCrjj4niyto/w-d-xo.html
I go through the operational sequence of a 4-cycle engine. Around 3:04 you can see the exhaust valve opening just prior to the piston reaching BDC (bottom dead center) of the power stroke. From that you should be able to time your engine. Do not over-tighten that set screw… you do not want to strip the threads.
Thanks for watching, Please Subscribe!
That is what keeps this channel running.
Ron
Are the ignition modules holding up?
Early on with the ET1 (M90) sometimes the engine would quit and there was no spark. It was discovered (actually by a friend of mine) reducing the voltage from 4.5 VDC to 3 VDC seems to fix the over-voltage problems, if the problem exists. This is accomplished by using two batteries instead of three.
The problem is occasional and inconsistent between engines. Not every engine ignition system experiences this. I usually try using only two batteries plus a dummy first to see if it will run. If not, then I use all three batteries.
I have a video on making the dummy battery. It is explained there. Dummy Battery For Hit & Miss Engines
Some of the later engines will not run on 3VDC and all three batteries are required. That's just the way it is. Call it inconsistency of components used in the ignition systems???
I know some people have purchased new ignition systems but I do not know if the original actually had a problem or not.