My first project

Discussion in 'Introduce Yourself' started by delorean_mac, Apr 23, 2008.

  1. delorean_mac

    delorean_mac New Member

    Hi! I am starting my first project and I have a coupe of questions. If you change the carb on a lawn mower engine, then can you tilt it sideways and use it for friction drive? Also, does anyone have plans for mounting an engine for friction drive? I have a mountain bike already, I just need an engine, which is proving to be a challenge... I can't find a weed wacker locally on craigslist or freecycle. I need to find an engine for under $10. Can anyone help me?

  2. sparky

    sparky Active Member

    Will an all position carb help oil spilling into the crankcase... or from the crankcase?? Whichever it is...
  3. graucho

    graucho Active Member

    Hi delorean. Welcome to MBc! Home of many answers, and awaiting your ideas.
    Sorry my friend, no. Oil will dump into the crank/piston/head area. This is why they make a horizontal shaft engine.

    General request to all new members.
    Please, before posting any questions, do a search. Then READ,READ,READ.
    There is a ton of information here. Many of your engine and performance issues in the Garage & Tech/Mech Help have already been covered. Here at MBc we are the home of nearly all MoteredBike questions. If you search and are unable to find your answer, don't hesitate to post your question. Were here for each other! Enjoy! :grin:}
    Here's a great crash course post "link" to get you started.
  4. delorean_mac

    delorean_mac New Member


    Thanks for the link - very helpful. I'm sorry for being such a noob:smile:, but I am just very frustrated that I haven't been able to find a cheap weedwacker in my nieghborhood for weeks now. Thanks!
  5. Scottm

    Scottm Guest

    Welcome to Mbc, check pawn shops, garage sales and craigslist for used garden equpitment.
  6. BSA

    BSA Guest

    Welcome to the forum.

  7. delorean_mac

    delorean_mac New Member

    Thanks to all. I believe I have found a motor suitable for my project. It is a 28 cc weedwacker on craigslist for 20 bucks. It was the cheapest I could find. I hope to get it soon...
  8. sparky

    sparky Active Member

    How and what are you thinking of putting it on?
  9. quay1962

    quay1962 Guest

    welcome to MBc! good luck and happy motoring!
  10. delorean_mac

    delorean_mac New Member


    I am using a mountain bike, off brand, and mounting it for friction drive.
  11. HoughMade

    HoughMade Guest

    If I understand your question about the lawn mower engine, you want to take a standard vertical crankshaft mower engine, alter the carb mounting, and turn the engine so the chrank is horizontal. If this is not what you are saying, I apologize. If it is, don't do it- it will not work, at least for long. These engines are splash lubricated and if you turn the engine 90 degrees, oil will not get splashed where it needs to be and it will seize fairly quickly. To run horizontally, an engine should be designed that way.

    Welcome! You are correct to consider weedwackers or maybe even a chainsaw...the problem is that if you get the engine for cheap, there is a lot that goes into making it work well and relatively safely....that being said, if you have the mechanical moxy, you can make it work!
  12. delorean_mac

    delorean_mac New Member

    Yes, that's exactly what I'm saying. I am picking up my 28 cc weedwacker tomorrow, so we'll se how it goes.
  13. delorean_mac

    delorean_mac New Member

    Well, I got the weedwacker, which turned out to be 31ccs. I have to go to Home Depot to buy replacement fuel lines and something to mount it to the bike, but after that, I'll start putting it together! I'm thinking about using pipe to mount to the frame and put the motor on. I'll also need a wheel for the shaft, since I'm using friction drive. I don't know how I'm going to mount the wheel to the shaft, though.......
  14. sparky

    sparky Active Member

    My friend used to have a GoPed back in the day with a friction driven motor right above the tire. The super cool thing about it was the motor was on this hinge thingy that lifted once you pulled an older shifter type lever (one that didn't click). The way the engine spun, it just pulled itself & the tire downard. It was definitely very cool.
  15. delorean_mac

    delorean_mac New Member

    I was thinking about puting a hinge on the motor, but it would be too hard, considering I'm trying to do this all within a $30 budget and I can't weld. Well, it's time to go to Home Depot to my stuff.. lets see how it goes!
  16. hellbilly

    hellbilly Guest

    Welcome and good luck. Let us know how it goes.
  17. delorean_mac

    delorean_mac New Member

    My stupid Walbro carb isn't working, now I have to take it apart... yet another setback in this project that is getting longer and longer. I'm wondering... how long did it take everyone else to make their bikes?