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Hi Justin,
I can’t speak for the Housai, but I had the identical thing on my M-14P.

Check your valve clearances. I found mine were a little tight. After adjustment, problem solved.

Failin ...

Hi All,

I am trying to install an air start distributor back onto an M-14P in a Yak-52.

I have the manuals, and I know what to do... It sounds not too hard, but it is almost impossible to do!
...

I have a friend with a complete set.

I have been meaning to get them off him and get them copied. If there is enough interest I can price up getting a few extra sets run off?

Reply with express ...

Craig Payne makes them. yakman285@gmail.com (On 14/05/2019, at 2:44 PM, Peter Scott <peter@scottbase.id.au (--> Yak-List message posted by: "chrisunrau" <cunrau@gmail.com (

Hi All,

Can I pick your collective brains please?

Is there an intake air filter available that I can for to the M-14P carburettor on my Yak-52?

Here in New Zealand the summer heat crates a lo ...

Hi Walt,

Yep, I considered that. Admittedly I am an engines and airframe man and I much prefer working on bits I can hit with a hammer.

In my defence though..

The switch is very typically ...

Can I ask a stupid question..... Why would you want to?

My Yak is in a syndicate of 9 people, so we need to track flying time so Rob can send each of us his monthly hate mail.... the bill.

Given ...

Hi Nigel,

If you are running the Russian plugs I would check their resistance. I had the same symptom and found I had an intermittent mag coil failure caused by high resistance plugs. Reject any ...

Hi Javier,

As an A&P who has my own yak-52 I echo Mark comments. The only time you should be doing pulling bits off your airplane is for routine maintenance or when something is busted.

Pul ...

Hi Mark,

I pulled it out and had a look inside. It had burnt the points out completely. I replaced the points with a serviceable set from the old one, rigged up an automotive spark plug and lead ...

Hi All,

Does anyone have a KP-4716 or DH-2 Booster (shower of sparks) coil they wish to part with please? Doug is out of stock.

The one in our Yak-52 has died after only 35 hours in use.

Man ...

So, I pulled the plus on my Yak-52 today as a part of the Annual check and measured the resistance through the core (plug lead contact to electrode). I found a varied set of resistance values ranging ...

Hi there,

We had exactly the same fault on ours a few months ago. I found that one of our magneto coils had an intermittent open circuit.

Have a measure of the resistance through the electrode ...

It will depend where you live and who writes the rules and regulations.
Here in New Zealand they require the bottle is removed and pressure tested every 5 years and borescope inspected every year or ...

Hello again All,

I have pulled the dud coil apart and found an intermittent connection between the secondary coil and the plate that connects to the cigarette. Out comes the soldering iron!

I h ...

Ok, so I replaced the duff coil and all seems to be happy in the world again.

Ground runs were fine, and we did a proving flight close to the airfield with no apparent issues. I am calling it fixe ...

Hi Frank,

I can tell you from personal experience on P&W engines it is entirely possible to backfire them out of the carburetor. In fact the old guys who flew DC3's around southern New Zealan ...

Yep, George's theory sounds plausible. If the primary circuit winding went open circuit at the right time then the magnetic flux would collapse and one plug could fire prematurely. That could consum ...

Ok, so to add to the story.....

On Sunday I pulled the two magneto coils out of my machine.

I did a simple continuity test on the bench with a multimeter across the primary and then the second ...

Appologies. I wasn't trying to make a political statement, merely a humorous one.

Really....Trumpville? Keep the politics out of these discussions. Damn.

Here in New Zealand while we don't hav ...