RE: Seagull's
that some people used a Sullivan soft side tank does anyone have the part number handy? 4 Stroke
Posted on: 12/12/2010 3:53 PM by Author "4 Stroke" in the forum "Twin & Multi Engine RC Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10192920

RE: Seagull's
Just got my DA and am in the process of putting it together. I'm planning on putting a couple of Magnum .52 four strokes on it. Just curious if anyone else has done it and what they did on the throttle linkage. The throttle arm on the motor sticks abouve the engine box, if I could reverse the throttle arm on the engine I think it would work a lot better. I have read most of the thread and it sounds like all Seagull models have CG errors in the instructions, my Edge 540 had the wrong CG stated in the instructions also and if it hadn't been for the postings on this website it could have been fatal. 4-Stroke
Posted on: 12/11/2010 10:41 AM by Author "4 Stroke" in the forum "Twin & Multi Engine RC Aircraft"
http://www.rcuniverse.com/forum/fb.asp?m=10190459

RE: Fun Cruiser Repower
I need to try to stay with air cooled if possible being most of my running is in salt water, Will see whats out there, might have to come up with a flushing system.....
Posted on: 10/10/2010 12:14 PM by Author "4 stroke boat" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10059455

RE: Fun Cruiser Repower
Thanks..... I will check e bay out or contact him on any exchanges or mods, I do run in salt water so I hope he has some options.
Posted on: 10/9/2010 7:58 PM by Author "4 stroke boat" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10058328

Fun Cruiser Repower
Had enough of the Homelite! Entertaining any ideas including 25cc Honda, Any input or comments welcome, Thanks!
Posted on: 10/9/2010 4:09 PM by Author "4 stroke boat" in the forum "Speed - RC Gas Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10057971

Anything Vintage, Diesel, 4 Stroke, 2 stroke. marine as well
Anything Vintage, Diesel, 4 Stroke, 2 stroke. marine as well Hi All, I am New to this site, I am 16 years old, and I collect anything vintage, stationary engines, vintage mowers, vintage chainsaw's, vintage plane engines, old marine engines, 2 stroke, 4 stroke, diesel. I have 64 Stationary engines, earliest is 1919, I have 6 model engines earliest is a 1959 OS PET 099 1.06, I would love
Posted on: 5/16/2010 10:23 PM by Author "Saito OS 4 stroke" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9738379

Green Stuff
Hey Dave; I have some general interest questions: 1) On my 63S, the green coating on the disc valve is almost totally gone. How much does this affect engine performance ? Should it be replaced ? 2) The 63S beats the old 63 by about 1000 rpm on an 11x7 prop (my examples). How much of that is due to the green stuff ? Thanks;
Posted on: 8/11/2006 4:05 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=4611093

RE: .63 problems..
I had a similar problem when breaking in a YS 63 with a test mount. If you eliminate the usual fuel line and tank problems, check the prop hub/washer/prop to see if it is slipping. If the prop slips, the engine will stop immediately at wide open throttle. It has been my experience that ABRUPT stopping is caused by the glow plug coil vanishing or the prop slipping on the hub (or running out of fuel).
Posted on: 8/9/2006 2:04 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=4602233

RE: YS 63 FZs question
Either the LS or the Pro Pattern is much better for the YS - leaves some oil on the valve train.
Posted on: 8/3/2006 10:58 AM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=4578606

RE: ys open header???
Hey Dave; Is there an equivalent straight pipe for the 63 ?
Posted on: 6/30/2006 2:46 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=4449190

9V buddy box connector
Dear Bax; I have an old 9VHP transmitter that I thought would be ideal to use with my XTR simulator. I wired the DSC cable to the XTR cable and all is well. Unfortunately, the location of the DIN jack on the 9V is exactly where my hand wants to be. This must have enraged many people trying to use the buddy box with the 9V (hence the 9Z jack in the center of the back). Do you have a low profile right angle 7 (or 5) pin DIN connector to fix this problem ? Do you know where I can find one ? Buddy Box or DSC cable with a right angle connector on each end ? The usual internet search turned up one at DigiKey which still sticks out about 18mm.
Posted on: 6/30/2006 2:38 PM by Author "4 Stroke Guy" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=4449162

12Z to 14MZ Model Transfer
Bax or Krista; Is it possible to transfer a model from a 12Z to a 14MZ and vice versa using the compact flash card? Thanks
Posted on: 4/18/2006 8:43 PM by Author "4 Stroke Guy" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=4182015

12Z and 14MZ Mode 1
Hey Bax; Are you actually going to stock Mode 1 transmitters? Why do you have the unmitigated audacity to charge $100 extra? You know, those other guys don't charge extra.
Posted on: 4/5/2006 5:20 PM by Author "4 Stroke Guy" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=4128685

12Z pdf manual
When are you going to put the 12Z pdf manual online for download so that I can decide whether or not I want to buy one. Pretty pictures aren't going to get the job done.
Posted on: 4/5/2006 10:52 AM by Author "4 Stroke Guy" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=4127468

Digital Servo Programmer
Hey Bax; Why don't you sell the Futaba digital servo programmer? You got one laying around in the service department don't you?
Posted on: 3/7/2006 3:08 PM by Author "4 Stroke Guy" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=4004121

Gas Porting Works
Hi Dave; I finally got around to finishing my gas porting experiments on the FZ63 (modified with the external 63S regulator) in a helicopter using heli fuel with low viscosity oil. It worked out really well. The engine runs very consistently on 30% LV heli fuel. There is none of the previous surging/leaning/bogging/rpm changing. The engine also idles beautifully. I used a 1/16" endmill and went in from the edge of the piston about 1/32" resulting in four half round notches. I suspect that what we are actually doing is helping the seal between the bottom of the ring and the piston by exposing more surface area of the ring to the combustion gases. The 63S is heli ready out of the box for anyone who is interested. Thanks Dave
Posted on: 3/7/2006 2:34 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=4003981

RE: Any Flyers/Airfield in Atlanta?
Go to www.winderhobby.com and hit the Clubs button. Atlanta is a big place.
Posted on: 2/18/2006 10:43 AM by Author "4 Stroke Guy" in the forum "RC Helicopter General Discussions"
http://www.rcuniverse.com/forum/fb.asp?m=3926985

Gas Porting Details
Dave; I did a search and read many years worth of posts on gas porting and the problems that it solves. Your continued enthusiasm has inspired me to gas port my three 53's and two 63's that predate this mod. I have some very specific questions about the four 0.040 (#60) holes through the top of the piston into the rear/inside edge of the ring groove. 1) Do you center the holes on the rear edge of the ring groove (as viewed from the top of the piston) ? 2) How far into the ring groove (vertically) do you go ? It intuitively seems that if you go to the bottom it creates a port all the way around the ring. I could also use a 1/16 end mill (which is close to the 1.5mm referenced in one post) and go in from the top or notch in from the side of the piston. Similar two questions. 1) How far past the inside edge of the ring groove do you go (notching sideways from the outside in) ? 2) How deep into the ring groove (vertically from the top) ? My original attempt was to mill four 1/16 holes into the top of the piston centered on the rear/inside edge of the ring groove and down into the groove 0.010". It ran fine but winter has limited my testing. That is, I don't know if it actually helped anything. I entirely missed this gas porting thing because I put modeling aside for the first three years that you did it. Thanks Dave; You are a very patient man and answer each question at least ten times.
Posted on: 2/10/2006 3:05 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3886662

RE: Gas Porting Details
Thanks Dave; I'll let you know if it solves my problems as soon as the weather improves.
Posted on: 2/8/2006 11:52 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3887806

RE: 91 ACH
Dave; The 53 snout fits a custom made flywheel/fan in an old XCell 46 graphite heli and works fine. There are still a few guys who want to revive old orphaned 4-stroke heli's from about 10 years ago. They generally come with a (busted) 91ACH. My point is that it is more cost effective to convert a new engine. The 110 should fit and give a slight boost. The external regulator is better than the old insulator plate on the 91ACH. The new 63S is heli ready and works very well if you can make it fit. Question: I notice that the elaborate multi-fuel ported 53 carb barrel has been replaced with a single tappered slot on the 63. It this a general trend in new YS four strokes ?
Posted on: 1/26/2006 10:37 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3829956

RE: 91 ACH
Dave; Could a 110 be further insulted by running it with the YS63S external regulator (assuming that you made a cover plate for the hole) ? I insulted a shinny new 63 today by installing an old 53 crankshaft in it.
Posted on: 1/26/2006 3:38 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3828161

91 ACH
Hey Dave; Can the old 91ACH throttle barrel (or compete carb body) and regulator insulator plate be installed on a 1.10 to produce a 1.10 ACH ? Thanks
Posted on: 1/24/2006 10:32 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3821095

Gas Porting and LV Oil Fuel
Hey Dave; I have a curious problem with an old 53. It runs fine on 30% fuel with 20% high viscosity oil ( Cool Power Pro Pattern and Red Max Performance). It won't run at all on Cool Power 30% Heli fuel (with 23% LV oil). Have you ever encountered this problem? This engine predates the piston gas porting. I only changed to the Heli fuel because the LHS could not get Pro Pattern.
Posted on: 12/28/2005 10:25 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3702937

RE: Mode 1 Flyers, UNITE!!
I have flown mode 1 since 1968 also. That includes Bonner, RS Systems, Kraft, ProLine, JR Century 7, ACE, and now Futaba 9VHP and 9ZHP. I have never, never, not once ever bought a mode 1 transmitter. Conversion used to be easy. With the 9V/Z you have to completely disassemble the transmitter. Tower now offers to sell the 14MZ on mode 1 for a mere $100 US extra. That's really nice of them. It's not like they sell mode 1 all over the world. They have to specially make these mode 1's for the USA!
Posted on: 12/18/2005 4:11 PM by Author "4 Stroke Guy" in the forum "RC Radios, Transmitters, Receivers, Servos, gyros"
http://www.rcuniverse.com/forum/fb.asp?m=3667267

MOVED: 15mm ID O-ring Adapter
Glow Engines: http://www.rcuniverse.com/forum/fb.asp?m=3661195
Posted on: 12/16/2005 4:55 PM by Author "4 Stroke Guy" in the forum "O.S. Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3669804

15mm ID O-ring Adapter
I would like to use the Hatori 640,725,821 style mufflers on OS FS engines. An adapter that screws on the end of the flex pipe and fits the 15mm ID O-ring would be nice ! Anyone make such a thing ? Say 11x0.75 thread and 15mm smooth outside.
Posted on: 12/16/2005 4:55 PM by Author "4 Stroke Guy" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=3661195

RE: YS 4 Stroke HP Ratings
So in summary. The HP peak is beyond the usable rpm, where the valve train disintegrates. Run as fast as you dare with as much nitro as you want. I actually run the 53 at as much as 14,700 rpm and the 63 at about 13,200. Both on 30%. I have noted that Heli fuel with low viscosity oil does not lube the valve train very well. I have switched to pattern fuel. I remember a discussion about calibrated "load props" from about 30 years ago. They come with a HP vs. rpm chart. Does anyone currently sell these ?
Posted on: 12/15/2005 4:27 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3657629

YS 4 Stroke HP Ratings
Come on YS guys! If you post HP ratings, someone must have put these engines on a dynometer and plotted a HP curve. Why don't you post the RPM at which this HP was achieved in the above sticky post ? We understand that it won't be the prop RPM. For example, a typical 2 cycle engine produces max HP at 16,000 and runs the prop at 10,000. We understand also that HP ratings are done at favorable conditions and probably 30% fuel. Put the RPM in the above chart.
Posted on: 12/14/2005 2:10 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3653472

YS 63S
Dear Dave; I run YS 63S's in Helicopters. I would like to know the horsepower peak using 30% fuel so that I can gear it accordingly. I know that it is closer to 15000 than the recommended prop 11000. Also: I recently make a special tool to unscrew the external regulator and replace the silicone rubber diaphragm. I discovered that it is not threaded and does not unscrew ! What is the recommended way to replace the diaphragm ?
Posted on: 12/13/2005 9:35 PM by Author "4 Stroke Guy" in the forum "YS Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=3651224