install of new engine

Discussion in 'Mechanic and Repair' started by Orkin Yards, Jun 3, 2001.

  1. Orkin Yards

    Orkin Yards LawnSite Senior Member
    Messages: 256

    my new engine is coming in on tuesday and i need a little guide as to what to do to put it on, never done one before but i did the transsmision w/ a little help from my friends, so i figure i can pull a new engine off to...its a 17hp kaw going on a 48 scag electric clutch belt drive...what do i need to know?
  2. ljmey

    ljmey LawnSite Member
    from Georgia
    Messages: 16

    The hardest part of changing/replacing engines is getting the electric clutch/pullys from the old engine, you may need a pully puller. Most of the time the pullys come off with no problem, screw driver or wrecking bar usually brings them off. The rest is just a matter of disconnecting and reinstalling gas line, wires and t-cable. Don't forget to tighten all bolts and put oil in the new engine before trying to start it. Some people do forget to do this. Good luck.:p
  3. Eric ELM

    Eric ELM Husband, Father, Friend, Angel
    Messages: 4,830

    Jeff, if you need a pulley puller, most rental places have them for rent.
  4. sdwally

    sdwally LawnSite Senior Member
    Messages: 386

    If you are replacing the engine with an identical engine, it should be fairly easy. Not that different engines are hard, but sometime slight modifacations have to made. One then to check the new engine is mounted is proper belt alignment. This is easily checked with the belts install by looking at the belt from pulley to pulley. They should be staight runs. If there is an angle, then pulleies will need to be repositioned. If not, belts will not last as long and you will loose some horsepower and erode the pulleies. Another way to check true alignment if there is room is to use a straight edge and lay flat across the top of one of the pulleies, the straight edge should parallel the belt. If the straight edge is long enough to lay across both pulleies and the pulleies have the same thickness, then the straight edge should lay flush across both pulleies. It doesn't have to be exact, however the truer they are the better.

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