Light Aircraft Association

You almost certainly have a air leak in the system between the spider and the cylinder. if the engine has been rebuilt then the likely culprit will be the castings to the cylinder and the gasket between them, the castings bow and should have been faced on a flat surface to check.. The gaskets will ...

Hi Phil, I am no expert on engines, but applying a bit of logic would indicate that unless the exhaust length changed during or after rebuild, then it is unlikely that the length is the culprit. Otherwise you would have had the same issue before. There a few unknowns with this whole setup. The firs...

Spent a chilly spring evening switching carbs, the problem is still the same. Stromberg or Marvel the front cylinders are still EGT 150-175F higher that the rears. I am going to pressure test the spider tomorrow, but I have another thought regarding the exhausts..... Unlike virtually every other C90...

Thanks Graham,

Was that a brand new carb or a refurb? I have bought a brand new factory built carb, it would be pretty poor show if I needed to spend more money to get the thing to work well.

Phil

Hi Gerry,

I have trawled through the Harry Fenton site and even sent him an e-mail.

The carb is the one listed on the type certificate for the C90, but one difference is that I have a carb with a one piece venturi which is also supposed to change the carb characteristics.

Phil

Hello All, I have a slightly puzzling problem with my recently rebuilt C90 engine. The front cylinders are running lean and consequently the EGT is about 150-200F higher than the rears. The front plugs are very pale and the rears are sooted up. The engine has less than an hour on it since a complete...

Conrad wrote:........... any new or retrofit installations will need to be carried out by a qualified installer.

Maybe it will fit the market or the market will choose, that is the beauty of having choices............

Phil

Thanks chaps,

I looked at the Aeromatic props, but they are really expensive at nearly $5,500 plus VAT, shipping etc. The other problem is that they are quite heavy too.

The SR3000 option sounds promising, but the factory didn't respond to my enquiry, perhaps I will try them again.

Phil

Thanks Kevin,

I didn't get any response from the factory to my enquiry so your input is very helpful. What is PCD?

Phil

I have the 525 battery, it has similar output to the 625 but is a slightly more compact shape. A quick scout of Google will also find you ready made battery mounts for your Odyssey battery.

Phil

ColinC wrote:
I'd still like AS & S to get their act together and do something about the stuff they sent me though.

Colin

Hi Colin,

As you paid using your credit card, perhaps you should put the payment into dispute on the basis that you did not receive goods of the required standard.

Phil

It looks like the Hoffman mechanical prop fitted to the Grob 109 has an FAA approval for the O-200, but the downside is that it seems to have a 200 hour TBO which is very low. Most on the new composite props electric don't seem suitable for direct drive engines due to power pulse problems. The Princ...

I am interested in knowing if anyone has experience or knowledge of either mechanical or electric variable pitch props for the C-90 or O-200 engine?

I have spent the past few days scouring the internet for information and have come up with very little.

Thanks in advance

Phil

Hi Stuart,

Speak to Pete Smoothy at Airworld UK, he seems to know alot about that type of undercarriage leg.

Phil

I need to replace the screws that secure the cover plates on top of my control column, which itself is a butchered yoke from a PA-28 Warrior or Arrow. I have tried 4-40 screws and they are slightly too big. Does anybody know the correct size of screw and thread I should be using? Thanks in advance P...