Office of Steam Logo_1

Author Topic: Advise on china "M" series hit and miss small engines?  (Read 318 times)

Jim

  • Administrator
  • Hero Member
  • *****
  • Posts: 2423
  • Aussie Steamer always on the boil :)
  • Location: South Coast of New South Wales Australia
One other hand item to have is some clear tube a couple of feet long that will allow you to cover the fuel tank opening and blow using your mouth your fuel along the fuel line up to the carby and get rid of any bubbles if you get some.

Think from memory it was Bruce or Rog that came up with this hint.
_______________________________________________
Cheers.
Jim

My YouTube Channel https://www.youtube.com/user/Blue123Heeler/videos


ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
Ahh!....found a better price on 12oz cans of Zippo lighter fuel...got it down to $5.08 a can when I purchased 5 cans with free shipping!....I like saving $.... so I can buy more engines ;)

RedRyder

  • Administrator
  • Hero Member
  • *****
  • Posts: 2426
  • Location: Connecticut - USA
They don't produce much fumes when running the way you want it to run. I had an M90 running on my desk for 4 hrs 56 min on a single full tank. I could not notice any severe deterioration in air quality. Come to think of it, I don't recall any air quality problems. That said, my hvac system circulates the air pretty well.

I see no issue with a short run indoors.

Gil

ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
Wow!....nearly 5 hrs on that little tank of fuel...that IS impressive.. .the Smiles Per Gallon is got to be off the chart!
  Thanks Gil!

Adirondack Jack

  • Jr. Member
  • **
  • Posts: 85
I live in an apartment in a two family house. I donít have outdoor storage, and donít like the idea of too much fuel in the house. Definitely not gonna use pump gas.  Zippo is relatively less obnoxious, and buying two of the bigger cans at a rip on Amazon itís not bad, and ships with no issues.
As to ventilation, Iíve initially set up in front of an open window with a fan behind me pushing air out.  Then I got an idea to build a vent system I could put in place in the open window like the old style screens we used to have. I bought a 110v powered, 100cfm computer fan, and mounted it to a doubled up cardboard box that just fit the open window opening. It worked pretty good as an exhaust system I could stow when not in use.  Iím toying with building what would essentially be like a range hood to pop into the window when needed. I park a small table in front of the window and set up on it.  The table is quite heavy, made to hold a potters wheel, so it doesnít rattle etc when a running engine is on it.   Itís not as nice as a dedicated workshop or garage, but necessary compromise when I had to move to the city, when my vision no longer allowed driving.   Where there is a will, there is a way.

cheepo45

  • Newbie
  • *
  • Posts: 12
  • Location: New Castle, Delaware USA
I have rigged up a 4" duct fan to an outside dryer vent for my shop. It works well for sucking the fumes outside.
I do like to run my motors on the workbench a lot, and this has helped to keep peace in the household!
 Scott

ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
A dryer vent sounds like a good fix, thanks Scott.

I won the bid on an M90 today!...hopefully I did not snipe it away from a fellow forum member. :o

Now I have All the Horizontal variants(that I know of) coming...that should keep me tinkering most of the winter!

ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
My china engine tracker said my engine was in IL yesterday!...only one state away....I am super hopeful I Will have it for the weekend.

St Paul Steam

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 2058
  • Location: St. Paul Indiana
My china engine tracker said my engine was in IL yesterday!...only one state away....I am super hopeful I Will have it for the weekend.
Your enthusiasm is contagious 😊👍
For the record I use zippo (love the smell) I have the vertical & horizontal engines , I think all the mods have been covered by many on this forum , have fun with your quartet of h&m engines.
Bruce
St. Paul Indiana , USA

ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
My china engine tracker said my engine was in IL yesterday!...only one state away....I am super hopeful I Will have it for the weekend.
Your enthusiasm is contagious 😊👍
For the record I use zippo (love the smell) I have the vertical & horizontal engines , I think all the mods have been covered by many on this forum , have fun with your quartet of h&m engines.
Yes....I am Eager to start tuning!

Now my tracker says china Engine at my local post office...not more than 15 min away....I can almost Smell the Zippo fuel burning...Speaking of Zippo fuel....my supply showed up today...just in time....

The small Aluminum plate with the brass pipe plug is a color test....it is dark Navy Blue...the brass pipe plug was to see how well the color goes with brass...my M92 will have lots of brass....it is and M94 that is arriving tomorrow...But the other 2 engines are from same Vendor, So they will not be far behind.

tony1951

  • Newbie
  • *
  • Posts: 24
One other hand item to have is some clear tube a couple of feet long that will allow you to cover the fuel tank opening and blow using your mouth your fuel along the fuel line up to the carby and get rid of any bubbles if you get some.

Think from memory it was Bruce or Rog that came up with this hint.

Another way to achieve the same thing without any equipment is to place a finger tip over the opening on the carburettor and rotate the engine perhaps two cycles. This will make the engine vacuum suck the fuel along the fuel line as all the engine suction is operates on the only path available - the fuel tank.

I do this whenever I start and it usually fires first flip. If you draw in too much fuel and flood the engine, it is a simple matter to SLIGHTLY  depress the inlet valve and spin the engine a couple of times to clear it out. No need for extra tubes. I stress the word sightly, because if you push it right in, it will come into contact with the piston.

Adirondack Jack

  • Jr. Member
  • **
  • Posts: 85
Iíve done the choke and spin method as well. Iíve also used my needle syringe I refill the tank with to clear the line.  Simply by feel, I use the needle to find the nipple where the fuel line attached to the tank, advance the needle a bit into the nipple, and push a bit of fuel. It clears the line nicely as well, without resorting to pulling the line off the tank.

ShadetreeMotorcycle

  • Newbie
  • *
  • Posts: 46
It's HERE!!....I like it....at first glance the M94 was my least favorite..but...taking it out and study it....its really growing on me!  Features I admire are the cooling fins in the head really look nice....I guess what I did not like is most of the walking beam and govenor mechanism are hidden behind the Flywheel so it's hard to see just what is going on....the other issue is the walking beam it self is very low on the engine as it pushes on a downward facing exhaust valve...the real issue is the wood box has a recession in it and the walking beam partially is down inside....I think my home built box base I will raise the engine and not let the walking beam be partially hid. Also a little polishing plus my Navy Blue planned paint job should make the walking beam stand out a bit better.
 
The photo shows some carbon brush soft springs I picked up at Ace Hardware to try this weekend. I have not run it yet because I had a super long day at work...but I will surely fire it up stock before bedtime!

 One of the things I am Super curious about is many have gone lighter springs to slow down engine....a couple more adventurous souls have mod piston for less compression, and I will likely try that on at least one of my engines...BUT...it seems like to me the lack of flywheel Weight is a big factor as to why the little engines can not compete with there full size brothers for slow run...I very much want to carve out some brass or copper or cast iron "tires" to slip over the stock flywheels to perhaps Double the weight...I am not sure I can go. That heavy as it will put more load on the bearings...but If I get it slowed down perhaps the lower RPM will help preserve the bearings...anyway...if I get it slowed down some this weekend I have some tire weights to stick on the flywheels...just to test how adding weight might affect the coast phase...I can see where To much weight could be negative as when the engine "Hits" it may not be able to get the heavy flywheels moving...so it seems like it may be a balancing act to find a sweet spot...I welcome input....to be continued.....

 

November EOTM Winner:

Clifís Lanz Bulldog Scale Model