Author Topic: HP rating? 42a707?  (Read 3315 times)

0 Members and 1 Guest are viewing this topic.

1fastkingcab

  • Guest
HP rating? 42a707?
« on: September 10, 2009, 07:43:51 pm »
Hello, I have been lurking for a while, I have found tons of useful info here on this site, but I have a question I just can't get figgured out on my own.  I have a old parts tractor made in the early 90's, I don't know what make other than it was green and had rear steering.  but anyway the tractor is very clearly labeled 16HP, as is the engine cover.  The engine is a horizontally opposed 42a707 which my research tells me that the 42a707 is a 42cu in engine, as far as I can tell 42 inch motors are 18HP.  but my engine cover very clearly says 16hp on both sides.

was this common? if I take a head off and measure the bore what if it is actually a 42cu in motor? is it 18 or 16 HP? does it matter?

Offline birdman_express

  • I'm not fast...but man I can eat! INTEKS RULE THE PITS!!
  • Global Moderator
  • Highly Mowtivated
  • *****
  • Posts: 3941
  • Karma: 31
  • Gender: Male
    • View Profile
Re: HP rating? 42a707?
« Reply #1 on: September 10, 2009, 08:02:11 pm »
It doesn't matter.

Marc Baker

ARC Dealer

Marc from ARC.... "Billet Billet"

Powered by a Full Bug E.C. 20HP Vanguard!!!!

Offline accutune

  • Turf Warrior
  • **
  • Posts: 279
  • Karma: 0
  • Gender: Male
    • View Profile
Re: HP rating? 42a707?
« Reply #2 on: September 10, 2009, 08:11:05 pm »
It doesn't matter.


he is right    the hp is just a sticker

1fastkingcab

  • Guest
Re: HP rating? 42a707?
« Reply #3 on: September 10, 2009, 09:09:45 pm »
OK kind of what I thought,

What about a simple drop in cam? I have been reading about cam to crank clearance issues with some setups, is there anything mild that just fits W/O crank grinding?

thanks,
   Tom D

Offline jerb

  • Highly Mowtivated
  • ****
  • Posts: 2895
  • Karma: 7
  • Gender: Male
    • View Profile
Re: HP rating? 42a707?
« Reply #4 on: September 10, 2009, 09:12:07 pm »
i have a buddy that ran a don-g cam, and if i remember correctly it cleared the crank with no grinding, but it was close!!
Tim Jerby
2010 round 2 monster energy drink mod-x champion
2009 mowfast mod-x champion
2009 mowfast sportsman runner-up
Coming soon...super mod twin!