single cylinder 4 stroke - is there such a thing - Page 2 - PeachParts Mercedes-Benz Forum

jeffwolinski · #1 03-10-2003, 11:40 PM

I have a Honda Foreman ATV (450cc) that is awesome with loads of power. Honda and several other ATV manufacturers are now making single cylinder 4-stroke ATVs at 650ccs. Only recently have ATVs become available as twin cylinders (Kawasaki Prairie - 650cc).

I have an old Ryobi 4-stroke trimmer with inter-changeable attachments that supposedly had the smallest commercially available 4-stroke engine. I'm not sure of the exact displacement, but it's pretty damn small. It has several teeny valves and an oil pan that holds several tablespoons worth of oil. It's been worked pretty hard for eight years and still going strong. Best thing about it is the lack of 2-stroke stench exhaust!

blackmercedes · #2 03-10-2003, 11:43 PM

Quote:

Originally posted by MikeTangas
John,

I just noticed your new avitar picture. Are you losing weight?

LOL! Nah. Just trying to get a rotating skull working, but having problems resizing. It's from the Silent Skulls motorcyle club. Thinking about joining. (really)

G-Benz · #3 03-11-2003, 11:17 AM

Quote:

Originally posted by The Warden
Just wondering, on the 4 stroke small engines i.e. lawnmowers, chainsaws (I didn't know 4 stroke chainsaws existed?), etc, do you still need to mix oil into the gas, or do they have an oil pan? Also, on the 4 stroke chainsaws, how did they make it so that the oil didn't go all over the place (i.e. away from the sump) whenever the engine is at an angle?

The oil & gas mixing is relegated to the 2-stroke engines...

tooter · #4 03-11-2003, 04:34 PM

A .3 Four Stroke model Car engine ?? It must be complex and expensive. Does it use regular valve springs ??
An eye dropper for an oil change?
Fuel injection or carb? A 4 barrel and dual turbochargers would really make it go !!
One a more serious vein, VW now has an experimental absolute economy vehicle employing a single cylinder 4 stroke Diesel (what else?), pushing out all of 8.5 hp. It can cruise at 60 - you may want to know the MPG, or the more up to date, l/km,(Liters per kilometer) (European)..

kip Foss · #5 03-11-2003, 05:42 PM

Four-stroke engines that run upside down, i.e. many racing motorcycles and airplane engines, use what is called a dry sump. The sump is a seperate tank where the oil is collected.

Two cycle engines are pretty much on the way out because of the pollution. Calif. has basically banned these engines, esp. in lawn mowers. Most outboards are going to 4-cycle. OMC (Evenrude, etc.) went bankrupt a few years ago and it looked like the end of the 2-cycle ob engine but since Bombard of Canada bought them out it looks like the 2-cycle will continue. Many city and state reservoir will not allow 2-cycle engines to operate on them.

I have worked with large (5,000 to 40,000 hp) marine engines for the past 25 years and most that I have seen are 2-cycle. The reason being that they do not require a gear box. The are started in forward or reverse using 300 psi starting air and a sequencing valve. They run at from 40 to 80 rpm. Most all new ships and many older turbine ships (Queen Mary was converted in Hamburg) use high speed marine Diesels. They are greatly more efficient than turbines and require much less maintenance that a turbine/ boiler combination.

#6 03-12-2003, 12:05 AM

Deutz and Hatz both make 4 stroke single cyl. diesel engines for years. And Hatz made one in about 10 hp... If memory serves. z-790 model.
hand crank to start, and runs forever!
Dan.

Holson Adi · #7 03-12-2003, 12:38 AM

Yeah

It does use valve springs. I kinda want to start the engine w/o its valve cover..

http://www.osengines.com/engines/osmg2092.html

here's a 0.4 ci one

http://www.osengines.com/engines/osmg2096.html

I loved bringing that thing to the 'track' and drive it among the 2-stroke rockets

Those 2-stroke rockets sounded like honda civics compared to the 4-stroke that sounded more car-like.

here's my "Viper"
http://www.nitroreview.com/reviews/viewreview.cfm?reviewid=154

somehow nbci closed my website

damn.. miss that car. I think I'm gonna have it shipped from wherever it is now (Singapore or Jakarta)

LuckyF8 · #8 03-12-2003, 01:05 AM

The smell of the oil burning in the two stroke high performance motor is like nitro in a four stroke hemi.

The small 2 stroke bike motors in the late 60's were awesome. My first one was a 1968 Kawasaki Trail 90, build your own dirt bike, in 69 the factory came out with a production race model, the 238cc Green Streak.........250 lbs 38 HP stock dirt bike. OH MOMMY!

This 250 class two stroke, dusted the old 500cc singles in all aspects, I had one, I know.

The two stroke motor makes power and torque at High RPM, as the design designates.

Some of my old two stroke, hot dirt bikes, would not idle under 6000 RPM, due to the barrel porting etc.

Ultra Fast Machines................

Do a search for the Kawasaki 500cc 3cyl two stroke (MachIII)

In 1969 this 3 cyl, 2 stroke (outboard cyl fired at the same time!) Super Bike, turned a 12.4 sec 1/4 mi, out of the box , in street condition.

The model is called "H1"

With all two stroke motors, "The Motor Oil" is mixed with the fuel, either by dumping oil in a Gas can, shaking it up and pouring it into the tank, or having a oil injector resourviour.

Check it out!

stephenson · #9 03-12-2003, 02:06 AM

Mike Tangas,

I have a 1972 BSA Goldstar 500 in the garage right now ... might even run ... well, need about 20 hours of work to get timing back on and fix a few fuel issues ...

Rode it daily in 1980s ... shin is still scarred ... use to leave the key in it as I don't think anyone could start one unless they were the owner ... always had oil on the ground ... "if there's no oil under it, there's no oil in it."

Paul Bates · #10 03-14-2003, 10:06 PM

Sorry, Mr. Warden - the Messerschmitt is a two-stroke engine - I shouldn't have mixed that comment with the four stroke subject.

The Warden · #11 03-15-2003, 05:29 AM

Oh okay, that makes more sense.

And thanks for the answers on the dry-sump and such!

I used to work at a West Marine in San Jose, and remember having exactly one 2-stroke Mercury outboard left...it never sold in the entire time I worked there, while people were buying the 4-stroke engines regularly...

One way or another, I'll bet the number of 2-stroke outboard motors decreases drastically over the next 15 years...