The International Cessna 170 Association

I met the engineer this past year at Oshkosh and am pushing to either get a field approval or forward progress on an STC. Paperwork is easy as long as data supports safe operation. For me, the largest gain from having the large diameter is more static thrust. The best part about carbon and wooden pr...

Hello Everyone! In the quest to advance the options for the 170, I am working on getting a field approval or STC in motion for a Sensenich 82" GA propeller. I have spoken a few times with some supporting individuals and we have come to the point where we are searching for a 170 with an o300 a,b...

Hello all, Working on an experimental o300 engine. I am planning on dropping in a set of combustion technologies 9.5-1 pistons along with a port and polish. Curious if anyone has experience with that size the main jet on the ma3 would need to be drilled to accommodate this? The other option is repla...

Valve rotators are for the purpose of providing even wear on valve-to-seat area and more even heat-transfer from valve to seat/head. They cannot be transferred to Superior or Continental cylinders without a basis of approval. I would recommend that you stop using unapproved additives in your engine...

Hello Everyone, I have been having some trouble sense I replaced my engine with sticking exhaust valves. The cylinders have just shy of 600 hours on them and were new Millennium Cylinders 2016. I am getting about 100-125 hours before I start having issues with sticking valves and have to pull them a...

Hello! I’ve got a Cessna c611501-0201 alternator off my 170 and I’m trying to find replacement brushes on a Sunday. Looking for an auto part equivalent so I can get it back together.

Alright. I think I've narrowed it down to incorrect gauge installation. I had my doubts from the start seeing the engine did not exabit any characteristics of over heating such as dieseling or pinging in flight. I replaced the gauge with a known good one and it again read 525. I unfortunately did no...

I have a few other gauges I’m going to try tomorrow along with installing an egt gauge in the same cylinder. Will report back.

I have 33-36 installed from the late b model and the rest of it is all early model. While mixing and matching baffling may lead to some things, I suspect the inner cylinder baffling, seeing for all o300 it purpose is the same, should not affect CHT by 100 deg. It might be worth noting that the plugs...

Also for some reason it’s not letting me upload pictures but in the c170b manual on page 93 it shows which parts I’m talking about.

When I got the d model it didn’t have 1-7 installed. Rather it had the inner cylinder baffling found in the late model as seen in the second picture.

George, I installed a alcor cht gauge and probe that is installed on the top spark plug on cylinder 2. Reading through the papers that come with the gauge it does say that it’s calibrated at 500 deg so the thermocouple would read 8ohms. I’d be very surprised if the gauge was not accurate. The only t...

Hello everyone. Running into some slight issues with my new to me motor. I recently I stalled an o300d model on my 170b. Motor is stock and has 400ish hours on new cylinders on a overhaul. Took it flying today for the first time and pretty quickly had the cht right at 525. It was about 65 outside an...

I found the shorter ones but will purchase the longs ones and send the extras to you!

I’d have to disagree with the compression ratio increasing power output. If the compression ratio increases the amount of air that is in the cylinder gets compressed more increasing the amount of pressure pushing on the piston. If the cylinder at bottom dead center accounts for no compression at by ...