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Update

Followed the starting procedure found in "the Definitive Pilots Operating Handbook" which is in part a translation of the Russian Handbook

Basically, one prime pump for every 10 ...

second update
went back to airport about 2 hours after this morning's failed attempts, started right up after only 2 pumps prime (was concerned this might be an overprime problem)

To answer you ...

Update

Checked spark at ignition coil wire, great bright blue spark up to 1/2 inch away from engine block so don't think that is the problem. Cleaned all contacts inside the cap and points

So, n ...

Yes, auto plug conversion last year

Dawg

no, if it's warm outside, I pull the blades, prime the system, prime the cylinders, crank it, if it tries to start I usually have to prime it 2-3 times to keep it running

Thanks Dennis, I'll try tomorrow, and post the results

Hoot, yes I have always needed to prime a couple of times ONCE it kicks over. But even with the blades spinning now I don't even get a partial firing, prop just spins

I have Dennis and in the winter I would use your technique after warming the engine for 20-30 minutes with a propane heater, seemed to help but was never totally reliable.
What is your input on the f ...

Have a 1982 Yak 52 for sale. Check Barnstomers add. I live in Medford Oregon

1982 Yak 52

Has always been difficult to start. Cold weather almost impossible without 2-3 tanks of air added. warm weather still difficult.
Have tried different priming techniques found online, ...

Looking for a resource to translate Russian engine logs
Thanks, Bill

1982 Yak 52

Where can I find the wiring diagram?

thhanks

understand, thanks

Yak52, original Balkan radio.

Scenario: radio working fine on landing. Go out couple days later, nothing , completely dead.

So far have replaced both the frequency changer front cockpit componen ...

oK, thanks, I'll check it out

where is it located?

Prior to engine start, YAK 52, when I prime the system with primer handle turned to left, nothing shows on the fuel pressure gauge except some very minor fluctuation of the needle. Is this normal? Or ...

Thanks to all

Replaced crush washers during engine replacement

Anyways, two more test flights since last post, and all seems to be working itself out. Starting much easier, running smooth.

Background:
Just replaced engine with, as far as we can tell from the Russian logs, an IRAN engine that has been sitting for 10 years. Initially, very difficult to start, requiring essentially consta ...