Yamada YS 175 CDI
It also seems that the 175 can run on much lower nitro content less $ and deliver awesome power.
Idle on the 170 is 1500 and 175 is 1200!!
Prop is 20x10.5 top RPM 6000 to 8000(if recall correctly from the manual)
It is identical to the 170, but they went back to the old carburator without the needle for the cranckcase cooling.
Better termination on the hall sensor in the back plate, and the spark plug cap is bigger and better.
Regards
Alejandro P.
regards
steph
As Don mentioned above, this engine is the best running YS yet, extremely easy to set, and the vibration at idle seems to be half of the 170.
Yamada told me APC was working an a new prop for it, 21x10 I think it was, but not 100% sure, time will tell.
Regards
Alejandro P.
Just kidding..!!!.
Hi Alejandro,
Thanks for your answer, and I have got ananother question: is the value of the RPM that you give is coming from a measurementor is it an estimation ?
Few years ago I used with success YSengines and I well known Christophe and Benoit because I followed them during 3years ago when I was team manger, in these conditions I well known tooadvantages and inconveniences of YS 4strokes engines.
My interest is in the performance of this engine, I researcher measurement and not impressions.
regards
steph
Measurement, I will let you know more as soon as the engines start to get loose after a few flights, note this is with 30% nitro, not 25% as recomended. On the next flight I will get you exact numbers, as once the engine is set the first time there is no need to recheck RPM, and the RPM increase with flights.
Christophe and Benoit have been flying with the 175 for over a year now I think, they can give you exact numbers as they tried the engine from the start I guess, I will give them a call if I were you, they might know more about the new coming prop.
Regards
Alejandro
have you done good flights ?
I know what you say for the increase of RPM in flight
I interested in the performences of engines serie''s and not in the performence of "selected or prepared" engines as it is the the case for Benoit or Christophe engine.
regards
steph
Best regards
Alejandro P.
Adrian
Any one have long term update on this engine? What would be good 3 blade prop (need ground clearance)?
Thank you
I think that Biela and Menz make an 18x12 3 blade woodie. I've not usedeither so I can't vouch for performance or sound.
Mezjlik has an 18x10 carbon 3 blader which I have used on my OS GT33. Works adequately...not quite enough prop tho. And sound was only average. A 12 pitch would be much better.
It might besimpler andless costly in the long runto put on a longer gear set that will handle the 20" props. If you need something lighter than most, I can help
The engine is very reliable provided, good fuel is used, good plug and valve maintenance and very good tune in, the later determines if an engine will be a great engine good for 400 flights without dis-assembly or a nightmare after 100 or 150 flights.
Regards
You have to use after-run oil to prevent corrosion, besides that, there is nothing better than use after-run and remove the engine then store in a ziplock bag.
Regards
For long term storage I remove the plug, flood the engine with oil then spin the excess out with a starter.
Then I remove the cam cover and fill it up then put the cover back on.
After each flying session I open the carb and turn the engine so that the intake port is open then add oil down the intake, then spin with the starter.
There are no starting or plug flooding problems at the next session.
I've been doing this for several years now on all the motors I have and the bearing life has increased noticably as well as elimination of corrosion.
Dave
After each flying session I open the carb and turn the engine so that the intake port is open then add oil down the intake, then spin with the starter.
I just shut the motor down with the throttle, drain the tank and put the plane away although it's only about 4 weeks max between runs. Replace the bearings every year and no signs of rust, but I live 100 miles away from the closest ocean and don't suffer from high humidity. I also try to leave the engine in a position where the valves are closed and the throttle barrel is shut (ie not cracked open in the idle position) so the engine is "sealed". Can't say that it works but leaving the throttle half open with a valve or two open as well just seems to be inviting moisture (and oxygen) into the engine...