Johnson Iron Horse Motor AR472

Made in 1949, this engine came on a Bob-A-Lawn mower I got a while ago. It has an Air-Vane type govener and a Suction type carburator.This engine is rated at 3/4 HP @ 1900RPM. The bore is 2 1/8 X 1 3/4 stroke.

Category:

Autos & Vehicles

Tags:

• Johnson
• Iron
• Horse
• Motor
• Bob-A-Lawn

[matthebest018]

i have the exact same engine that a neibor gave to me but i cant get now spark the coil is not cract or nothing it is almost mint i even gapt the points and condensor i get a very week spark can u help me thanks

[jds44]

Strip the ignition system to the basics, unhook the wire from the points to the kill switch/condensor and give it a good spin. Turning the flywheel by hand will not produce a good spark.

[mossberg42mb]

great vid nice to hear one run I purchesed one and can't get it to though a spark. the coil is all dried up and cracked. where can i find parts?

[jds44]

Sometimes there is some parts on EBAY, but  the best way is to find a "parts" engine to canabalize

[radicalnegative1]

What's the advantage of having a slanted cylinder?

[jds44]

I am not sure, maybe to get a lower profile? Or they just wanted to be diferent.

[jack9102]

@jds44 not true; i can start my iron horse AR401 by hand

[b262222]

@christhetromboneguy it is 4 stroke. you can see the part of the valves at the side of the cilynder. that is where the valves are in.

[christhetromboneguy]

is that a 2 cycle? (i feel real supid asking)

[jack9102]

its running a little rich.. i have an AR401 that ticks like a clock.(even in the dead of winter- one pull :D) maybe i'll put it on an old reel mower thats in the shed... o_0

[RFKFANTS67]

I had two of these little guy's, and I know where there are a few other's in good shape. O yeah the ones I had that were kick start

[RFKFANTS67]

I had two of these little guy's, and I know where there are a few other's in good shape.

[prrk5]

Nice engine, I rarely see these at the engine shows anymore in my area. Nice to see a running one.

[douro20]

Pardon me, I meant Chore Horse.

[douro20]

These were the only four-stroke engines Johnson ever made. They were specifically designed to be stationary engines and were primarily used to power washing machines. They did make one generator with this engine called the Chore Boy.

[crazyrocker1989]

That is freakin awesome!