Mike,

Very nice job there. A very good furnace and cooking surface.
With winter approaching, you will be the one that the women of the tribe choose to breed with 

cheers

Yes, the Changfa water cooled diesels are amazingly tough and durable.

   CUSTOM ST-5 LISTER(OID) SERPENTINE PULLEY

This is a custom machined pulley for an 1800 rpm generator head.
When coupled to a Listeroid with the standard 23" flywheels, it provides the correct ratio
to drive the generator head at 1800 rpm.
It uses a standard automotive flat surpentine belt.

It also comes with a 38mm shaft bushing to match with the shaft of an ST-5 generator head.
Solid steel. Weighs about 15 lbs
Price: $135 CAD

Can ship anywhere in Canada at owners expense.
Send me a PM if interested

veggie

The work that these Changfa single piston engines can do is unbelievable.
https://www.youtube.com/watch?v=viQK57ec_rY

"I always found it fascinating, these overhead shafts would run in wooden blocks as bearings, and pretty much last forever".

Yes, they are amazing... until you forget to lubricate them with pig fat       Then they catch fire

Fred8

The engine only sounds quiet because my system is designed to run at 1150 rpm.
If I ran it at 2600 rpm with full output it gets very loud. (Typical Changfa type engine.)
The pulleys are sized so that the generator spins at synchronous 3600 rpm when the engine is turning at 1150.
This limits the system to 1.3 kw max output at 120 volt AC.

To modify the engine for an external oil filter you will have to confirm that your engine A] Has an oil pump and forced lube system. B] The engine has a removable filter screen that can be modified.
I don't have pictures available of the modification, but the the objective is to remove the cover giving access to the pressurized screen filter chamber.
Remove the screen filter and machine a plug that fits into the filter chamber. The plug has holes and an o-ring which re-route the incoming oil to an external port. Through the filter, and back into the screen chamber, then onward into the engine. Each engine size probably has a different sized screen and chamber so each mod is custom to the owner.
As far as I know, only engines size 175 and larger have the removable screen cover. Smaller units (160,165, 170) do not have this feature.

Your assumption of approx. 1/3...1/3...1/3 power between crankshaft, coolant, and exhaust energy is correct.

Gathering exhaust heat however, can be messy and difficult. Soot and carbon clog exhaust heat exchangers very quickly if not designed correctly and if exhaust velocity is not sufficient. Even then, regular cleaning may be needed.

Here is another example of an enclosed system that a fellow built. Provides power and heat.
https://www.youtube.com/watch?v=Rx0ODuaoWwE


good luck with your project, keep us posted

cheers veggie

Something looks wrong there.
The babbit appears to be scored (lighter grey material) and the section near the end of the shell (darker grey) looks like it's not contacting the main bearing journal.   

Hi Mike,

That one you linked is for hydraulic service and has a one-way check valve in it.  Gravity won't open the check, so unless you can remove the check valve I doubt it will work.

cseyfert,  ... Good catch !

Mike .... remove the check valve