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Red Admiral
06-25-2005, 06:22 PM
Could anyone please tell me the CC (or HP) of the OS 20 FP engine? Thanks
water dog
06-26-2005, 12:13 AM
You could check the OS website .
piper_chuck
06-26-2005, 08:03 AM
According to an old OS engine chart, their HP is .5 @ 15,000 RPM, they weigh 210 grams and they are 3.46 cc.
Red Admiral
06-26-2005, 11:24 AM
cheers!
Hydro Junkie
06-27-2005, 04:15 AM
Sounds like aircraft engine specs. Most of them won't top 16K RPM
Red Admiral
06-27-2005, 06:27 PM
I have purchased one for my r/c boat, its the water cooled one. Im hoping its faster than the electric motor currently installed!
Red Admiral
06-28-2005, 07:27 AM
Does anyone know where the fuel in is and where the water pickup and outlet on the engine is, here is the best picture i have of the engine:

http://i14.ebayimg.com/04/i/04/54/46/bb_1_b.JPG

Thanks.
piper_chuck
06-28-2005, 09:52 AM
A picture is worth a thousand words. The water direction doesn't matter.
Red Admiral
06-28-2005, 02:52 PM
Brilliant! Thankyou very much!
Red Admiral
06-29-2005, 01:53 PM
What is the connection on the muffler for? It is to the left of the carb on the above picture.
Hydro Junkie
06-30-2005, 11:45 AM
A pressure line to the fuel tank. By pressurizing the fuel tank, you get a more consistant flow of fuel, in most applications
piper_chuck
06-30-2005, 11:40 PM
What is the connection on the muffler for? It is to the left of the carb on the above picture.
Darn, I missed that one. You've already got the answer.
Hydro Junkie
07-02-2005, 04:56 AM
Sorry about that, Piper Chuck. I've got an old late 80's aircraft version going into a Kadet Jr I'm working on and it was in the instruction manual(now if I could only find that manual :confused: )
piper_chuck
07-02-2005, 08:40 AM
Sorry about that, Piper Chuck. I've got an old late 80's aircraft version going into a Kadet Jr I'm working on and it was in the instruction manual(now if I could only find that manual :confused: )
No big deal, just irritated with myself. I've been around engines for long enough, I should not have missed it. The stats I gave him were from an OS engine chart I got with one of my early to mid 80's OS aircraft engines.

Can't help with the manual, all mine are from the FSR series. You might try emailing OS, they've got some older manuals that don't appear on their web site.
Hydro Junkie
07-02-2005, 06:59 PM
Not going to worry about it, that's why I got into these forums. There's always someone that would know how to set up a 25 FP with an air bleed carb around somewhere:)