Found extremely rear and old (1932) soviet boat engine P-5 "Pioneer"

[Shekastui]

Hello to everyone. Unfortunately I don't know German language, that's why I will write in English. I'm from Russia and once your forum helped me a lot with the information on Forelle 6 engine. Now I feel obliged to share with you the photos of really rear boat engine, I've found recently. For more than 10 years I've been collecting soviet boat engines. Now I have 20 different model produced after WWII. The oldest one was produced in 1953. But in september I was lucky to find the engine produced in 1932 or 1933! It is called P-5 "Pioneer" and it was the first boat engine to be produced in USSR. it was produced in 1932-1933 by guild of deaf and dumb people in Moscow. No more than 2000 engines were produced. I was lucky to find one in Elat'ma town of Ryazan' district in Russia. Probably this engine is the only one that survived.
Here are the only images of that engine I've found, except for my own photos. 1933 photo from the factory:

The image from an old soviet book:

This is how the engine looked like when I brought it to my house:

One piston refused to leave the cylinder. I had to keep it in diesel fuel for one month before I was able to remove it with hydraulic lifting jack.

At last it was completely disassembled:

Then everything was washed using "Aquablast" technology:

Many parts are made from copper:

The piston that was hard to remove was completely blocked, so I had to disassemble it completely. Instead of clip rings they used corks from aluminium to fixate the stud. So I had to drill them:

The stud and the copper bearing were completely ruined:

The quality of the parts is terrible:

I've already made a new bearing, the stud is luckily similar to the studs il Lada Priora car.

One of the cylinders had a terrible looking welding, had to remove it:

At he moment all steel parts are send to powder coating, screws are send to zinc coating.
I will post the further process of restoration if you are interested. Feel free to ask any questions. I can also make posts about other soviet engines I own if you want.

P.S. The owner of the engine told me that his grandfather exchanged this engine for a horse. Hard to imagine it nowdays.))

[Frank63]

Hello to Russia,

very interesting...please go on with your illustrated documentation of repair.

Regards,
Frank

[Startpilot]

In my understanding Russian people are known for their capability to repair almost everything resp. to be able to create a running engine out of scrab.
These skills are mostly forgotten in our regions due to easy consumable and cheap new parts and engines even as more and more complicated constructions.
Most of the producing companies don´t want them to be easily repaired...

Keep on with documentation of your work; my great respect!

[Shekastui]

Zitat von Startpilot

In my understanding Russian people are known for their capability to repair almost everything resp. to be able to create a running engine out of scrab.
These skills are mostly forgotten in our regions due to easy consumable and cheap new parts and engines even as more and more complicated constructions.
Most of the producing companies don´t want them to be easily repaired...

Keep on with documentation of your work; my great respect!

In fact you are right. But in Moscow we are facing the same problems now. I'm restoring GAZ-24 "Volga" car and it is nearly impossible to find a good carbuurator specialist in Moscow now.

I have another project with friends. We placed V8 GAZ-53 truck engine to another "Volga" car to make the replica of KGB version of that car. And I had to travel 450 km to Ivanovo town to balance the crankshaft of that engine, cause nobody in Moscow could do that.

[Shekastui]

The restoration is on! The parts returned from powder coating and the screws returned from zinc coating. I started the assembly.
Using small lathe I made the corks fixating the stud in the piston.

Then I hammers them into the piston and removed the sticking out part of the cork with a Dremel.

This is how the screws look like after zinc coating:

I had to cut some new sealings:

Finished the fly wheel. It weighs 12.5 kg!!!

The "leg" is also ready:


Now I have some problems with a crankshaft. I can't press a new upper bearing on it, so I need to polish the upper part of the crankshaft. On the contrary the lower bearing won't fixate on the crankshaft. So I'll have to weld the fitting place on it and then grind it to the needed size. It will take some time.

[Shekastui]

I started the assembly. I polished the upper part of the crankshaft and the bearing pressed on it without any problems. The lower bearing i fixed with Loctite 638. Unfortunately I broke one of the piston rings, now I'm looking for someone who will be able to manufacture me a new one. Also the fly wheel is completely demagnetized and I'm looking for someone to magnetize it. The ignition system besides the magnets is alive!