HM-01 Hit & Miss Engine Kit. Let's Build An Engine And Run It! Part 2
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- Опубликовано: 20 дек 2023
- On our last video of this project, we fitted the crankshaft after addressing a slight issue with the main bearing support journals, we installed the piston and connecting rod, and roughly mounted the flywheel. Let's finish the build on this impressively well made kit and see how we did. There will be more videos on this engine in the future as I continue to tweak and adjust things but I'll be sure to have you guys out in the shop with me so we can all see it together. Thank you all for watching and commenting (I really enjoy reading them) and if you're not already subscribed, do me a favor and click the button so we can continue to grow the channel.
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As usual I learned some stuff watching your patient methods. Thank you Mr 212! Your gear whine will settle down...use grease on them too... and if you want longer miss and better starting and power at low speed, well I move the ignition as close to TDC as I can. Looser spring of course
Thank you Mr. Thomas. Your video is full of helpful hints and tricks on this engine. Now that this one is finished I was able to watch it, and I should have watched it before building mine. Keep up the GREAT work and awesome videos 👍
I agree on leaving the key/balls out of the slip ring. Another great video. Thanks for posting!
Awesome little kit, 212! I'm glad to see these Engines have come so far in terms of manufacturing quality from what they started as. Obviously some are still better than others, but this one is definitely a winner.
I couldn't agree more. They have really stepped up the machining quality on this one.
Also, the groove on the crankshaft under the collar in the governor is for ball bearings. I put mine in and the collar slides nicely on them, but it is keyed to the crank now. I think that's a 6 of one, half dozen the other decision. If the collar rotates freely there could be wear on the brass governor weight fingers. When it is keyed to the shaft all the wear is on the steel pin for the detent arm. Leaving them out is definitely easier than getting those little balls in there though!
Yeahh 🤙
-I built mine a couple weeks ago, and was really impressed! Musa (and Cison) do an awesome job on all their kits & products.
I have put probably 10 hours of runtime on mine, and it only gets better and better. After a couple tanks of fuel, the gear whine disappears.
I am very impressed with this kit too, so far it has been the best quality I've worked with from them.
Nice one. They do look very nice & not too expensive to buy. Merry Christmas. Have a good one.
Steve.
awesome
ll these kits I've seen so far produce a spark for every revolution, wasting battery power in slow mode. I'd like to see one what works like the full size engines, which only spark when it's on compression strike with the exhaust valve closed, like the full size magneto ignition engines do.
This model does not fire every revolution like most of others. It closes a set of points to fire the coil only when the governor releases the lockout for the exhaust valve to close. Much like a full size engine but instead of a mag being tripped it fires the ignition coil. I hope that makes sense? Thank you for watching and commenting 👍
Matt, another great video. Hope to get mine running soon. Brian
I have been debating on weather or not to buy one of these. You may have changed my mind. I'll have to go back and watch part 1. Did it not come with instructions?
I thought it was interesting how they locked the govenor slide collar as on my full size antique engines the collar slide isnt locked, that gear whine on others with the too tight spring sounds really bad nice to know you have left it out as im sure leaving it out is the best idea for lower wear and drag - i think your gear whine is just because its new. (i hopefully can get one of these soon)😎
Get a cheap 6-in-1 screwdriver and the 1/4" driver is the perfect long reach socket for these engines. The cheapest ones have the thinnest walls and will slip right in there without cutting down the outside.
My plug is 8mm though
huh, mine is a 1/4 32 plug like almost all the other engines I have and my Harbor Freight screwdriver fits just fine. It's the fat end socket on the screwdriver and might be 3/8"
G'day mate, really enjoyed the video, is their another with it run in? Cheers, RiskY
Hi John, I haven't made another video on it yet but I am planning to get one done soon. Thanks for watching and commenting 👍
gear noise....valve lapping compound while running perhaps?
I have just assembled my HM-01 and have no compression, it blows back through the carburettor / throttle. can you give me any advice?
done a test with the carburettor removed and put finger over the opening and I get compression.
So it’s the inlet value I’m having problems with
Great video as allways!
I see you left the keyway out of the governor, there are some steel ball bearings in the kit and the intent is to drop 2-3 of those in keyway slot vs key stock, however i like your idea of leave the keyway out! I know at least one HM-01 all ready has heavy wear on the finger that rides in the groove, perhaps your way may help reduce wear?
Despite the gear whine i feel your model is all ready more quiet than others with the extra parts left off.
I look forward to see if you can tune it for slow run after it breaks in a little?
I have heard of slot-car guys put toothpaste on gears and run for an hour as there is super fine abrasive in toothpaste,you can then rinse with warm water and lube with favorite lube...not sure it is enough to polish these engine gear teeth.
Glad to see the oiler can adjust to a decent rate....hope you go "all in" for best slow run tune, hope we do not have to wait long for part 3
Anyway you could give me the measurements off of the governor collar? Mine ether didn’t come with it or I lost it.
I didn't tear mine down to get the most accurate measurements for you, but the major OD is 17mm, ID Is 8mm, the lock out slot is 2mm deep, governor finger groove is 3mm deep, 4mm width between grooves and 11mm wide overall. I hope this helps you
@@steam212thank you
What is the best fuel and oil should be used on hm-01.
I use SAE 30 weight oil (not non detergent). As for fuel, I burn VP race fuels 40:1 premixed. It is non ethanol 91 octane. I have not had any issues with it gumming up the carburetor or settling out in the tank if it sits for a while. I've found that it doesn't attack any of the rubber components either 👍
Well done.
I were going to buy one, and the gear whine also from many others put me off.. However, since then, found out some good thick sticky oil, completely stops it.
The spark plug also looks very set in the head, with little room for an open end spanner to unscrew it.. or is accessing the hex easy?
I honestly think that the gear whine is directly related to the fact that the main bearing journals are bored a bit low (why it was pinching the main bushings) it sets the gears too close together. I'll be pulling them out and turning the OD on the lathe to get the proper clearance. There is absolutely no way to access the spark plug with anything other than a socket (I turned down the end on a deep well 8mm)
how do you know which way to change the timing gear
The best way I can explain it is to imagine that the cam gear is set exactly where it needs to be when it fires the ignition, keep that gear stationary. And see what position the crankshaft is in (between 6 o'clock and before 9 o'clock, it is firing before TDC) just after 9 o'clock it is firing after TDC. Looking at it from the cam gear side. I hope my explanation made some sense and it helps you.
That slot is for 3 or 4 ball bearings.
I opted to leave them out. In my opinion using hardened round balls in a brass slot to prevent rotation is a terrible idea. We all know what will fail first.
Ignition happens when the points go open, not closed
On a normal points and condenser setup, but on these engines they use a hall effect pickup (essentially a magnetic reed switch) when it closes it completes the circuit and it fires the high voltage coil.
@@steam212 Realized that after watching 'til the end. Same type of ignition as vintage autos "Buzz Box" ! My error