OS FT 120 early Gemini first start

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OS FT 120 early Gemini first start

Рет қаралды 3,973

Күн бұрын

Hello, my dear viewers and subscribers !
Previous short video, dedicated to the OS FT 120 Gemini flat twin engine was a kind of teaser, before full video version was completed.
Few facts: OS FT 120 Gemini - is the first 4 stroke multi cylinder engines, developed and produced by OS Engines, Mfg., Osaka, Japan. It was designed and developed by Mr. Kazuhiro Mihara, one of the talented OS Engines engineer. I think, that he's so important and interesting historical person, that it will be necessary to make a separate video story about this legendary and historical engineer. So, back to the topic - OS FT 120 early Gemini is mounted in the bench, let's start it and watch the full story !
Thank you for watching and have a nice day !

Пікірлер: 13

@maurohenriquerodriguesdasi261 Жыл бұрын

Fantástico. Original carburetor ?

@crazyengines88 Жыл бұрын

Sim, senhor, concordo plenamente com você, um motor maravilhoso. O carburador é original, muito simples, tipo "air bleed" Obrigado pelo seu comentário e tenha um bom dia!

@xKmotx Жыл бұрын

That is a jewel of an engine! 😍

@crazyengines88 Жыл бұрын

Thank you for your comment ! Definitely, yes, Sir, agree with you ! From terms of engine design, its shape and general shape is very similar to the Continental O-200 engine, developed and produced by Teledyne Continental Motors (TCM). The only difference is 2 opposite cylinders instead of 4 from original. Even the shape of cooling fins is very similar. You can judge by yourself: kzfaq.info/get/bejne/odphf8RjkpvFmZs.html Also, lets look on to engine's head and valve construction. I've some experience with rebuilding of OS FT 120 and FF 240, at this part it is very similar design.

@miketango244 Ай бұрын

a great engine! But you didn't do the best thing you can do with the engine, just start the engine by hand, it starts wonderfully😁

@stevebarr9604 Жыл бұрын

I'd love to get my hands on one of those for a big Cub! That's a sweet sounding engine!

@crazyengines88 Жыл бұрын

Thank you, agreed with you ! The only thing, regarding the sound, due to the fact, that this engine has a firing stroke every revolution (360°), so it's sounding tone is twice higher, instead of the single cylinder engine, where firing stroke comes at every 720° crankshaft revolution.

@mikeeiben3430 Жыл бұрын

That is a good running engine. Does it have a serial number on the back plate. I have an FT-300 with the serial number 0142, do you know what year the FT-300 was released.

@crazyengines88 Жыл бұрын

Hello, and thank you for your comment ! Yes, my OS FT 120 Gemini has a serial Nr. on the back side , unfortunately, I can't read it now, because engine is still installed on the bench mount. Regarding your question about the FT 300 production year, yes, I know, it was 1986 and this year was the most successful year for O.S.Engines Mfg,. In1986 few the most iconic engines were released: OS FF 240 "Pegasus", OS FT 300 "Super Gemini", and their first radial, OS FR5-300 "Sirius". It is very interesting that all the names of these engines refer to the stars, and the constellations, to the cosmos.

@stevebarr9604 Жыл бұрын

Does it have separate low speed needles or just one for both!

@crazyengines88 Жыл бұрын

Hello, and thank you for your question ! This engine using two-needle OS type 2B carb. It is one of the earliest engine version, as far as know.

@YangGuici Жыл бұрын

Nice video and great engine. Like it so much. Do you use the glow plug power support while it runs? Thanks.

@crazyengines88 Жыл бұрын

Hello and thank you for your comment ! During first few runs glow batteries were connected, that was easier to make an adjustments and to understand engine's behavior. During qualification run batteries were unplugged. W/o glow support engine low rpm's are floating. I think, that engine needs more break-in time, at list, few hours more.