Scag SW 48A-17KA Smoking Motor

Discussion in 'Mechanic and Repair' started by Brantley, Oct 12, 2013.

  1. BigFish

    BigFish LawnSite Platinum Member
    Messages: 4,121

    You don't even know that you NEED OS pistons yet, no?
    Any online vendor that deals in Kaw. can get em. Or yer local Kaw. power dealer.
    You need to have yer engine code off the sticker. It should be FH500V-AS?? . The two digit AS number is what ya need ( like AS04).
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Messages: 4,334

    Before I would go thru the expense and labor of oversizing the engine...
    I would search the internet for the cheapest new FH500v engine I could find..
    Just take the gearset out of your block ...and install them in the new engine..
    Kawasaki doesn't sell short blocks..
  3. Brantley

    Brantley LawnSite Member
    Messages: 74

    The cheapest I've seen is $1000. I'm just not willing to spend that.

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  4. Landrus2

    Landrus2 LawnSite Fanatic
    Messages: 5,020

    We moving to fast on this engine. Pistons oversize bore it's not the way to go on my opinion. What is the piston and ring to bore clearance :waving:
  5. Brantley

    Brantley LawnSite Member
    Messages: 74

    I will have to wait to tear it down.

    My main goal in starting this thread was to figure out my options and how much it might cost; therefore giving me enough information to make a wise decision. $200 for decent mower is good unless my only option is a new motor.
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  6. Landrus2

    Landrus2 LawnSite Fanatic
    Messages: 5,020

    That sounds a lot better :waving:
  7. Brantley

    Brantley LawnSite Member
    Messages: 74

    I really appreciate everyone's thoughts and advice. I will do a cylinder leak test and then measure my tolerances between cylinder piston and rings. Once I have completed these test I will return with my findings and we can go from there. Thank y'all again.
  8. CL&T

    CL&T LawnSite Senior Member
    Messages: 493

    Friend bought a 52" with that engine that smoked on startup for $1500. Used it awhile and it kept bending a pushrod on one cylinder. Bought a new engine for $1500. Took the heads of the old engine and in the one cylinder the head of the piston was all carboned up so I guess it was whacking the exhaust valve when it was open.

    My opinion is what do you expect for $200? I wouldn't waste my time trying to rebuild. You're not going to find parts to overhaul an engine that is past it life expectancy. You're supposed to buy a new one.
  9. The Lawn Ranger CT.

    The Lawn Ranger CT. LawnSite Member
    Messages: 194

    Try this site~ "small engine warehouse" I did a quick search and it shows a shortblock for the kaw~I was able to get a short block for my fh500v last yr through them~
    Here's the link to the page, hope it helps~
  10. Brantley

    Brantley LawnSite Member
    Messages: 74

    My dad has a 48" scag as well his has a Briggs vanguard 16 hp.

    I saw this engine on eBay and thought it might work. What do y'all think?

    What would I need to add to it?
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