Questions about 3W 106cc std

faisal · 11-30-2007, 10:34 AM

Hi,
I am new with big airplanes, I bought a used Quique Yak 54 with 3W 106cc std with DA electronic ignition. The engine is running not quite well, it gets very shaky around 1600 rpm and the Max rpm is around 5200 with TMB 28X10, the transition fairly ok. I would like to know a little bit more about this engine in order to get a better performance.
I am sorry for ask so many questions in one thread but I haven’t found any literature about these questions:
Aprox. Idle rpm with minimum vibration ( My propeller/hub is balanced ).
Aprox. Max rpm with TBM 28X10.
Operational temperature gap.
I read that there is away to increase the rpm with combinations between H and L, it’s a rule of thumb for that?
Any comment will be appreciated.
Thank you,
Faisal.

3ddd · 11-30-2007, 11:36 AM

get someone at your local club that flys gas and have them tune the carb out,it sounds like it is way to rich.if you want ,turn the lowend in till you get just a little burble at 1/4 to 1/3rd throttle and set the high side to max rpm and then back off about 400 rpm then recheck the lowend and fly it

marksextra · 12-01-2007, 06:42 PM

3ddd is absolutely correct. Good advice!

sweetpea · 12-01-2007, 09:50 PM

Isn't the timing or setup on a DA ignition slightly off the 3W (i.e. its not just a simple swap at the same locations)

If that's the case, that also could be your issue

plane · 12-02-2007, 01:28 AM

Single magnet hub takes the DA Ignition.
Time as follows:
Leading edge of magnet aligns with sensor pole @TDC.

Use a sharpie pen to make the mark on the magnet leading edge.
Some DA sensors are have the pole marked, some don't, if not mark on outside with a sharpie.
Set motor to top dead center and align the sharpie marks, tighten sensor screws.

faisal · 12-03-2007, 12:28 PM

Thank you very much to all of you guys for your posting.

I was wondering all the time about timing of the electronic ignition. Thanks to Plane I know how setup correctly the sensor and the magnet.
By the way which is a good idle rpm (1600 to 1800)?
Thank you,
Faisal.

sweetpea · 12-03-2007, 03:14 PM

I like around 1500.......its really personal pref.

Once I taxi out I hit my idle up mix switch before takeoff that I use for downlines and stalls.

faisal · 12-03-2007, 05:10 PM

Great tip Sweetpea!
Thank you very much,
Faisal.

11-30-2007, 10:34 AM	#1 (permalink)
faisal Flyin' Around Join Date: Nov 2007 Posts: 7	Questions about 3W 106cc std Hi, I am new with big airplanes, I bought a used Quique Yak 54 with 3W 106cc std with DA electronic ignition. The engine is running not quite well, it gets very shaky around 1600 rpm and the Max rpm is around 5200 with TMB 28X10, the transition fairly ok. I would like to know a little bit more about this engine in order to get a better performance. I am sorry for ask so many questions in one thread but I haven’t found any literature about these questions: Aprox. Idle rpm with minimum vibration ( My propeller/hub is balanced ). Aprox. Max rpm with TBM 28X10. Operational temperature gap. I read that there is away to increase the rpm with combinations between H and L, it’s a rule of thumb for that? Any comment will be appreciated. Thank you, Faisal.

11-30-2007, 11:36 AM	#2 (permalink)
3ddd Bad-ass Super Contributer! Join Date: Jan 2006 Location: pyote,texas Age: 55 Posts: 1,654 Blog Entries: 1	Re: Questions about 3W 106cc std get someone at your local club that flys gas and have them tune the carb out,it sounds like it is way to rich.if you want ,turn the lowend in till you get just a little burble at 1/4 to 1/3rd throttle and set the high side to max rpm and then back off about 400 rpm then recheck the lowend and fly it __________________ Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > LOOKS LIKE SINGLE LIFE IS A COMIN > Futaba, FROMECO:a good way to get a charge out of life My avitar says it all.3w all the time

12-01-2007, 06:42 PM	#3 (permalink)
marksextra Once U go Yak, U never go back Join Date: Mar 2006 Location: pa Posts: 77	Re: Questions about 3W 106cc std 3ddd is absolutely correct. Good advice! __________________ Airplanes are stoooopid

12-01-2007, 09:50 PM	#4 (permalink)
sweetpea So true Join Date: Jan 2006 Location: Whidbey Island, WA Age: 33 Posts: 4,553 Awards Showcase Total Awards: 1	Re: Questions about 3W 106cc std Isn't the timing or setup on a DA ignition slightly off the 3W (i.e. its not just a simple swap at the same locations) If that's the case, that also could be your issue __________________ ___SPONSORS____________________My Home Field_____ ___________

12-02-2007, 01:28 AM	#5 (permalink)
plane Bad-ass Super Contributer! Join Date: Jan 2006 Location: Gilbert, AZ Age: 60 Posts: 276	Re: Questions about 3W 106cc std Single magnet hub takes the DA Ignition. Time as follows: Leading edge of magnet aligns with sensor pole @TDC. Use a sharpie pen to make the mark on the magnet leading edge. Some DA sensors are have the pole marked, some don't, if not mark on outside with a sharpie. Set motor to top dead center and align the sharpie marks, tighten sensor screws.


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12-03-2007, 12:28 PM	#6 (permalink)
faisal Flyin' Around Join Date: Nov 2007 Posts: 7	Re: Questions about 3W 106cc std Thank you very much to all of you guys for your posting. I was wondering all the time about timing of the electronic ignition. Thanks to Plane I know how setup correctly the sensor and the magnet. By the way which is a good idle rpm (1600 to 1800)? Thank you, Faisal.

12-03-2007, 03:14 PM	#7 (permalink)
sweetpea So true Join Date: Jan 2006 Location: Whidbey Island, WA Age: 33 Posts: 4,553 Awards Showcase Total Awards: 1	Re: Questions about 3W 106cc std I like around 1500.......its really personal pref. Once I taxi out I hit my idle up mix switch before takeoff that I use for downlines and stalls. __________________ ___SPONSORS____________________My Home Field_____ ___________

12-03-2007, 05:10 PM	#8 (permalink)
faisal Flyin' Around Join Date: Nov 2007 Posts: 7	Re: Questions about 3W 106cc std Great tip Sweetpea! Thank you very much, Faisal.

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