Hit & Miss Engines - The Correct Fuel

Troubleshooting a new engine, which will not start. Fuels it will and will not run on.

Additional videos:

Upgraded Eachine ET1 Hit & Miss Model Engine demonstration.

Eachine ETX Vertical Hit & Miss Water Cooled Model Engine demonstration.

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[coilmotorworks]

We have had great success using 87 pump gas and Amzoil two stroke oil, 150:1 . Amzoil will lubricate the o-ring and cylinder and valves but won't harm the spark plug. The key is to dump out the unused fuel once you are done running the engine. My advice on starting issues. If the intake valve is not opening, that could be the reason it's not starting. The opposite can be true, once flooded if the fuel is not shut off the engine will not start. If flooded the engine can be turned over until the exhaust valve is open. Once open, let the engine sit for a few minutes to allow the gas to evaporate from the cylinder.

[ghjk]

Ah ! This video would have saved me a great deal of frustration !
Great info !
Everybody, including those who have a notion about hit and miss engines, should see this before ordering/starting their engine!

Paddy

[MaxSnelling]

A lot of information covered here.
Good straightforward video.

[Americadoe]

Husqvarna 2 stroke premix is 95 octane and contains 50:1 high quality oil. No additives or ethenol. Works great for me.

[AlanGorlick]

For viewers in the Australian region who can't get Coleman fuel anymore, the local equivalent is Shellite (100% naphtha) and is sold in the paint department of most hardware stores for a fraction of the price of Coleman fuel. The Kerzel HM1 hit & miss engine (a build from plans model) is the original design by David Kerzel of Florida that these Chinese toy manufacturers ripped off. The Kerzel design has a drip lubricator for cylinder lubrication and does not need oil added to the fuel. My Kerzel HM1 runs best on 95 octane premium petrol and will run on naphtha but with less power due to the lower octane rating. I use a Viton O ring for the piston ring and it is still running on the same ring from 18 months ago. Viton O rings are rated for 205C temperature and are highly resistant to petrol and naphtha, but not methanol or acetone.

[Primerk]

I added the lighter springs to both my vertical and horizontal engines. Alot of difference was made on the vertical. The horizontal however not so much. I believe it has to much compression as when it fires it really gets it spinning. I had read that the vertical has much less compression.

[royrice]

I will run this on propane. But, not for long as it has no lubrication for the piston and cylinder. It relies on lube from gasoline, diesel or kerosene mix, only after it gets hot (running temp.) This was not built for long running times. After it gets hot, I think you can slow the rpm down a bit by leaning the fuel out. I will see. This is some of the best machine work that I have ever seen. 👍👍👍 Looks like a Fairbanks-Morse 503 or 739. All that is missing is a condenser on top the water hopper. Thank you for reading my short novel!! 😬😬😬

[olivvapor]

Thank you for your excellent review ; I will try one of these some day ...
This horizontal model seems to be the easiest to get running ...

[Mike]

I have a question. But 1st I want to thank you for your awesome videos. Your posts are my go-to as I enter this hobby. I have also looked at many others. Most say that Ethanol Alcohol cannot be used to power these engines. I did some research and found some conflicting reports… “Pure alcohol will rott silicone O-ring pistons, plastic carb parts etc’… others say it will not. I found an interesting article about ethanol mixed with engine lubricants and how they perform in replace of petrol. Anyone can research more of the article by googling the title “Lubrication behavior in ethanol fueled engines” . The article stated that pure ethanol did not contribute any additional friction within the engine even though it thinned out the lubricant. It also stated that there was no varnishing and there was zero sludge compared to sludge left by petrol. I decided to try pure alcohol 97% food grade in my ET1. It works GREAT. Can you tell me why you stated that the engine will not run on alcohol?

[tenlittleindians]

I pumped gas in the 60's here in Iowa and the Conoco station still had a white gas pump. We used it in our Coleman lanterns and cook stoves but the main reason the gas station kept the tank around was to provide fuel for those in the rural community that still cooked with what were called kerosene stoves. Maybe the stoves would burn both white gas and kerosene; I don't know. We didn't sell kerosene anywhere in town in the 60's. The people buying the white gas always just asked for kerosene and knew we would fill their small spouted cans with white gas.

To make it even more confusing, it was always mentioned that the lead in regular gas would clog the gas generator in a Colman style lantern or cook stove and white gas didn't have the lead. A decade later they introduced unleaded fuel! People had no idea if it was just a new name for white gas or something different.

[JCGver]

about automotive gasoline in Europe and the USA: we use different system to determine the octane number. Europe uses RON and the USA uses AKI. 95 RON is about 90 AKI (close enough atleast)

[martinwalker]

I live in the USA and have a pump up lantern that uses kerosene. So you could find these types here at one time. I don’t know if you can now.

[davidbeet]

In Europe Aspen 2 is an alkylate petrol much cheaper than Coleman fuel premixed at 50:1. It works perfectly in this engine.

[billstmaxx]

7:44 interesting how you shut it off just before it craps out like mine does.. runs like 20 seconds and shuts off. Its nearly impossible to fill the tank as well as the filler hole is way to small to let the air back out.. Also they do have super great spark.. Good enough to spark right out the plastic on the wire.. grounds to the engine and wont run with it doing that. unfortunately these engines really need some upgrading

[RickTaylorpopnstart]

Crown(brand) and Coleman stove fuels seem to run the same in my mini engines. They are both crystal clear, smell the same, but the Crown fuel is a bit cheaper than the Coleman in Wally world, anyway. I have read that these fuels are only about 55 octane, but prolly good enough for the CR's this little engines have.

[douglasarcher]

Hi Ronald, I Picked up a ET6 after watching your video review and I love it. I'm using Colman Fuel (White Gas) with a splash of Marvel Mystery Oil and it runs great. My question is: What oil do you use to lubricate all of the moving parts?

[MicrobyteAlan]

Interesting and well presented, thanks from Orlando

[tomstrum]

Very helpful info on these model engines !! some engines arrive Without the black Ignition wire attached to the Metal engine eventually causes the "Returning" spark High voltage to Arc thru & Damage the magnetic Reed switch & possibly the Ignition made Sure my ignition wiring was correctly Block grounded & added 3 6 amp 20 volt Bidirectional polarity TVS diodes, 1 wired Across the Battery box + to -- terminals & Each wire (Except HV sparkplug wire) to engine Block ground to absolutely Protect the Expen$ive ignition Module from stray HV damage...Mine continues to run nearly 3 yrs now....

[michaelsmodelrailroading]

Very informative. Thanks for posting.

[jlgpldrexel]

I have an engine like yours and use to run nice but after a while no more compression on it, I read that piston rings must be replaced, rings are green rubber orings, I got the replacements on line and replace them, never ran again, Im afraid I fogot to mark the timing, con you help me sending some pictures from your engine to see gear and timing position?