Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Page 3 of 7 FirstFirst 12345 ... LastLast
Results 51 to 75 of 157

  1. #51
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: av8tor1977
    I would be interested in knowing how long your glow plug lasts if you stay with the set up you are presently running. Please let me know.
    I run the en\gine again (glow plug powered all the time, 93 Chevron gasoline mixed 1:30 with Motul oil - no methanol added). The engne run very stable 7400 rpm max (MA 16x8 Clasic) idling at 1600 rpm with very good transition. After a couple minutes it started to miss and eventually died. Then I couldn't start it again. I thought the glow plug went bed so I checked it. I found glow plug still in excellent shape but was not glowing orange, but rather dark red. The reason - glow battery died on me. I put a new battery and everything went to normal. Engine started after a few turns and run like usuall. I run it for another couple minutes without any problems.

    Conclusion:
    1. After total 20 minutes of runing I didn't notice any wear on engine nor glow plug.
    2. Current on the glow really doesn't matter. Engine fires when it wants to, but at least my Poulan 25 wants to fire at the right time.
    3. When glow plug is to cold engine just dies.

    I'm not going to abuse (test) my engine any more, as I need it as it is (magneto ignition) for the plane I'm building. However I just bought another Poulan 25cc. This one I will cut to the bones making it as light as possible removing also magneto support and flywheel. Then I will test it as gasoline glow engine for longer time. If it works well, I will have the lightest gasoline setup ever: about 2.5 lb 25cc engine (including muffler, mount and on-board glow) runnign from 10cc fuel tank. Any 'brand name' of that size weights at least half pound more (and costs 10 times more ). For comparision the MVVS 1.6 I have weights 33 oz plus 5 oz muffler, + 2 oz radial mount plus 5 oz ignition plus 3 oz battery. = total 48 oz. It was the lightest gas setup I could ever come with so far.

    RysiuM
    Visit my site at www.rysium.com

  2. #52

    Join Date
    Dec 2002
    Location
    La Paz BCS, MEXICO
    Posts
    1,986
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    RysiuM
    Which glow plug are you using? Read about using 4 Stroke plug in another thread.
    Where is the glow element in relation to the bottom of the metal (Alum) plug you inserted in the old spark plug?
    trying to tax into prosperity is like a man standing in a bucket and trying to lift himself up by the handle W. Churchill

  3. #53
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: mikenlapaz
    Which glow plug are you using? Read about using 4 Stroke plug in another thread.
    I must admit, I have no idea. It is not OS A3 (I have whole bunch of them), and looks like the other K&B plugs I have (KB-1L). I get it from the box I keep 'no good' plugs (It didn't not hold glow engines any more - like platinium is gone).

    ORIGINAL: mikenlapaz
    Where is the glow element in relation to the bottom of the metal (Alum) plug you inserted in the old spark plug?
    I made an aluminum insert pressed inside the demolished spark plug so the bottom of insert is flush with the spark plug bottom (I cut off the elctrode flush with the bottom of the plug). Then the glow plug is flush with this (it does not stick out of the spark plug).

    RysiuM
    Visit my site at www.rysium.com

  4. #54
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Finally I have some comparision numbers to brand name RC engine. I run the same wooden prop 18x8 I had on MVVS 1.6 gasser. This prop is way to big anyway. But my MVVS (new not broken yet) turned 6700rpm and after opening the muffler it peeked at 7000rpm. Poulan 25cc couldn't go beyong 5400rpm. It is over 1300rpm less.
    I was expecting this as I could easy feel Poulan has much lower compression than MVVS 1.6. But what the heck, if you are not into super high performance and want to save a buck, this conversion is fine.

    RysiuM

    Visit my site at www.rysium.com

  5. #55

    Join Date
    Jan 2005
    Location
    San Antonio, TX
    Posts
    1,402
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Hi,
    I bet that your MVVS won't run well with a glow and gas fuel. Hows that for low weight and cheap fuel?

    Dave
    Every day above ground is a good day.

  6. #56
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: davewallace
    I bet that your MVVS won't run well with a glow and gas fuel.
    I'm sure it doesn't. Do much compression.

    ORIGINAL: davewallace
    Hows that for low weight and cheap fuel?
    And for cheap engine. MVVS cost me 10 times more than this weedwacker (or 20 times if I don't include muffler).

    Every day with every new experiment brings new eperience and gives me more knowledge. But unlike many other guys I don't keep them in secret. I have this luxury to take is as a hobby and because I don't do engines for living I can let the secrets out

    I have another Poulan 25 on it's way so I will check is it behaves on the glow plug the same way. I'm going to make it super light gas fuel glow plug engine and put it on some 3D frame. Than I will see if it behaves.

    RysiuM
    Visit my site at www.rysium.com

  7. #57

    Join Date
    Nov 2003
    Location
    tijuanaBaja California, MEXICO
    Posts
    513
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Hi Rysium! this is areo nut from the gas fuel glow plug no ignition, where did you buy the engine at $25 bucks' I am currently flying a 25 featherlite plus with 50%gasoline, 50% methanol and 5% nitro and having a ball with it, better rpm's than gasoline , smoother and better transition from idle to high, so I would like to buy a couple more to convert and design a plane specially for that engine, I am currently flying a ModelTech Excite 90 and cand do everything with it, but it seem that they aren't selling that plane any more, or at least Hobby People isn't.
    So please I would appreciate if you can give the addres on where to buy the engines if they still have them available. Thanks.
    Your buddy from down Baja. Bill Pomplun A.K.A. Aero Nut.

  8. #58
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Hi Bill,

    There is a Store on E-bay that belongs to theplacenashvill - very nice and friendly people. Look for 25CC WEEDEATER ENGINE REPLACEMENT for $22.5 on auction ($25 on Buy it now) plus $10 shipping in USA. The catch is, thay can't ship to California (that stupid emission law). I don't know about Mexico. You need to e-mail them.

    Richard.
    Visit my site at www.rysium.com

  9. #59

    Join Date
    Aug 2003
    Location
    Springfield, OR,
    Posts
    87
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    For what it's worth, I have one listed on eBay #5986718199 that has the larger ports and the bolt on exhaust. It's from a leaf blower and should be an easy conversion. I can ship to California!....Bob
    Bob

  10. #60

    Join Date
    Nov 2003
    Location
    tijuanaBaja California, MEXICO
    Posts
    513
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    How much with shipping

  11. #61

    Join Date
    Aug 2003
    Location
    Springfield, OR,
    Posts
    87
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Hi again! If you are really interested in this engine you would have to win it through ebay. It ends next Sunday. These are light engines and the shipping would probally be $10 or less most anywhere on the continent. I feel a little funny about jumping in and selling something through these forums. Mostly I just moniter and have learned a great deal over the time I have been a participant. I do sell a lot of engines of various types on ebay and have been doing it for about 3 years. At any rate if you email me I am always ready to answer questions and so forth..........farley9n
    Bob

  12. #62

    Join Date
    Jan 2005
    Location
    San Antonio, TX
    Posts
    1,402
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Aero Nut,
    Here is the address for the exact engine our buddy used. http://cgi.ebay.com/ws/eBayISAPI.dll...986202297&rd=1
    I think that lower compression and smaller ports actually help gas/glow performance.

    Dave
    Every day above ground is a good day.

  13. #63

    Join Date
    Jun 2004
    Location
    Waldorf, MD
    Posts
    43
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Check Sears for discontinued or reconditioned weedeater 25cc featherlite string trimmers. I bought one today for $55.00 in like new condition. dave

  14. #64
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: me 02
    Check Sears for discontinued or reconditioned weedeater 25cc featherlite string trimmers. I bought one today for $55.00 in like new condition. dave
    I looked at the whole line of FL trimmers. There are many version of 25cc and some of them are allowed in California. I believe they are a little more restrictive for the power so it will not polute much. On the other hand, i think they will be weaker for our project. So I will stick with the enignes that are not allowed in CA for better power and performance. Hopefully our planes don't need to pass smog test yet to fly in California .

    RysiuM
    Visit my site at www.rysium.com

  15. #65
    Prop Nut's Avatar
    Join Date
    May 2004
    Location
    Coral, MI
    Posts
    1,721
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    The Poulan factory store in Texas sells the FL 25cc Leafblowers for 37.50 (we purchased around 10 of these last year) and they also make great conversons. The carb adapter is twisted so it makes it very easy to hook up to the servo. It is an incredibly easy conversion I have been flying mine on a BalsaUSA Eindecker for over a year (well the eindecker plinked in a couple of weeks ago due to me trying to fly on a dead battery, but the engine is one tough little bugger). I am getting almost exactly the same stats that you are. 7200rpm on a 16x8. Its not a powerhouse by any means but for 46.50 (cost with shipping) I have a reliable engine for floater aircraft. By the way, DONT CUT OFF THE EXTRA MAGNETO BRACE. Sorry for yelling If you have a hard nose landing (what? ME? Never!) you can easily crack the mag housing right off the engine. (Can you tell I have experienced this?) Some creative use of #6/32 screws and a tap fixed it up a bit.
    Scope? Listerine? Or Prop Wash?

  16. #66
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: Prop Nut
    I am getting almost exactly the same stats that you are. 7200rpm on a 16x8. Its not a powerhouse by any means but for 46.50 (cost with shipping) I have a reliable engine for floater aircraft. By the way, DONT CUT OFF THE EXTRA MAGNETO BRACE. Sorry for yelling If you have a hard nose landing (what? ME? Never!) you can easily crack the mag housing right off the engine.
    I have two new engines comming in and I want to see how light I can go. This time I will cut every piece of the case I would think is not needed (including magneto bracket and fuel tank mount). I want to see how light this engine can be running on the glow plug. One sub C size NiMh cell (3700 mAh) that weights 2.3 oz can power the glow plug for almost 2 hours. If it works fine this could combine all benefits of gas engine (fuel economy, clean burn, reliability, no restrictions for fuel tank positioning) with benefits of glow engines (light, simple, cheap, no RF interference). I'm not going to achieve the glow engine's power but rather having a gas engine witout going into all related expenses and complexity. And 7400 on 16x8 is good enough for me as long as it cost less than 50 dollars to buy and less than a dollar for 1 hour of flying

    Now I need to find a cheap plane that I can put this engine in.

    RysiuM
    Visit my site at www.rysium.com

  17. #67

    Join Date
    Dec 2001
    Location
    Naples, TX
    Posts
    424
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    I did this one just last week. Ultra Stik 60. moved the firewall back an inch and a half, put the servos in the tail, made a hatch in the rear of the fuse for the battery, used a Sullivan tailwheel. I don't know how accurate my digital fish scales are, but they say it weighs 7lbs, 10 ounces. I've got 5 flights on it so far, great flier and it still lands like a Stik. This particular motor turns an APC 16x8 at 8450rpm and gives the plane insane vertical. Looking for someone with a DA 50 to challenge to a vertical drag race out of a hover.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Pn36197.jpg 
Views:	8 
Size:	32.1 KB 
ID:	298754   Click image for larger version. 

Name:	Nj25455.jpg 
Views:	8 
Size:	35.3 KB 
ID:	298755   Click image for larger version. 

Name:	Nt46397.jpg 
Views:	6 
Size:	34.9 KB 
ID:	298756  

  18. #68

    Join Date
    Jun 2005
    Location
    Aurora, CO
    Posts
    63
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Farley9N -

    I see nobody bought your engine on Ebay....wanna sell it to me. I know you said you weren't thrilled to sell stuff on this forum, but if you would entertain it, let me know what you want for it. You can email me at sahussey12@yahoo.com.

    Thanks,

    Scott


  19. #69

    Join Date
    Nov 2003
    Location
    tijuanaBaja California, MEXICO
    Posts
    513
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Hey Rysium try a 50/50 gasoline /methanol combination on your glow conversion and you will see a tremendous difference in power also you won't need the battery just try, I thi8nk that you should be able to get some methanol in your locality.

  20. #70
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: aero nut
    Hey Rysium try a 50/50 gasoline /methanol combination on your glow conversion and you will see a tremendous difference in power also you won't need the battery just try, I thi8nk that you should be able to get some methanol in your locality.
    I read about all the problems mixing menhanol with gasoline and oil (I used Motul).

    BTW what kind of places sell methanol? I never needed one so I have no cle where to look for it. I didn't see it Laws, Orchard nor Home Depot, so it is not a probably paint solvent. I saw 91% isopropyl in Walmart (90c for 16floz) but I don't think it will work the same.

    One more thing is how my carb will survive methanol? I don't want to destroy it.

    RysiuM
    Visit my site at www.rysium.com

  21. #71
    Antique's Avatar
    Join Date
    Jul 2002
    Location
    Somewhere, DC
    Posts
    9,825
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Methanol won't destroy the carb...We rebuild the carbs on our methanol powered race engines and fly all season...I have carbs here from about 6 years ago, just put in a box and left alone...Only thing needed is new diaphragms, the old ones get stiff..
    FWIW, Walbro does NOT make any special carbs or diaphragms for methanol..The WT499 used on the glow G23 uses the exact diaphragms as all the others....You can see the official word from Walbro's engineer Luis Salas on the carb section at my website, rcignitions.com
    RC Ignition

  22. #72
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: RCIGN1
    Methanol won't destroy the carb......Only thing needed is new diaphragms, the old ones get stiff
    I read this note and it is exactly what I'm saying. I didn't mean that methanol wil rust aluminum or brass parts The rubber-kind parts in the fuel pump part will stop working over the season or two.
    I have a weed whacker and a blower that I'm using for last 7 years and I don't even know where is the carburator in these things I expect the same reliability form model airplane engine. I don't rebuild my glow engines every season and I'm not going to do with gas either.
    Saying that I don't mind running glow plug from the battery during the flight. NiMh cell will last much longer than diaphragms soaked in methanol. Sub-C NiMh (3700mAh) weights a little over 2 oz, will last for at least 90 minutes on one charge, and can be charged at least 500 times. It's much easier and cheaper to replace NiMh than rebuild the carb

    RysiuM
    Visit my site at www.rysium.com

  23. #73

    Join Date
    Nov 2003
    Location
    tijuanaBaja California, MEXICO
    Posts
    513
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    I agree with RCIGN1, but one thing to remember is that when you use methanol mixed with gasoline the effect over the diaphragm and pumps is totally different due to the fact that gasoline adds lubricicity to those parts and you aren't using pure methanol only; its like diluting the strenght of the effect of methanol over the rubber parts. I havent seen any damage so far on my carb and I had been using it for just about two seasons and haven't had the need to replace any parts on it.

  24. #74
    RysiuM's Avatar
    Join Date
    Apr 2003
    Location
    Elk Grove, CA
    Posts
    1,490
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer


    ORIGINAL: aero nut
    I agree with RCIGN1, but one thing to remember is that when you use methanol mixed with gasoline ...
    ...I havent seen any damage so far on my carb and I had been using it for just about two seasons and haven't had the need to replace any parts on it.
    I will give it a try. My next Poulan 25 should come today. I will cut off all aluminum parts including fuel tank mount and ignition support.
    I wonder - do I need to keep a piece of flywheel (shaved to to diameter of the hub) or can crap it using hub only? With a glow plug I shoud be able to get about 2lb an engie.

    If this engine weights no more than 2-1/2 lb (including glow battery, muffler and mount) and turns at least 7500 with 16 inch prop (I didn't try it with APC 18x6W yet but I think it will turn it around 7500rpm too), is it a good choice for Funtana 90?

    RysiuM
    Visit my site at www.rysium.com

  25. #75
    Rupurt's Avatar
    Join Date
    Apr 2004
    Location
    Cape TownN/A, SOUTH AFRICA
    Posts
    694
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Poulan 25 from FL trimmer

    Make sure you keep your speed down on the funtana 90, two at our club have had the right wing come apart in the air. One of them had a gms 120 and the other had a moki 135
    Somethings are stranger than fishin


Page 3 of 7 FirstFirst 12345 ... LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 10:09 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.