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Author Topic: ??Question of the day???  (Read 903 times)

Offline Bootlegger

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??Question of the day???
« on: May 12, 2011, 11:42:58 AM »
 #^ #^     Pulled down ST 60 for general inspection, now looking at the rod for chamfer to slip on the crank, both sides seem to have the same chamfer.
  I looked at the rod to see if there is some sort of mark indicating whet side goes toward back plate and see nothing..!!
   What and where is the indicator to let me know how to re assemble the engine correctly...
       Thanks, Gil
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Gil Causey
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Offline rustler

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Re: ??Question of the day???
« Reply #1 on: May 12, 2011, 01:22:51 PM »
Might help myself here. The rod sounds symmetrical, i.e. can go either way. However, is there an oil hole drilled, particularly the big end? And is it to one side?
 I always set these so the hole faces the gas on the upstroke, thinking this will force the fuel/oil mix into the bearing. But I'm never quite sure, anyone know for sure?
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Offline Steve Helmick

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Re: ??Question of the day???
« Reply #2 on: May 12, 2011, 03:49:59 PM »
The mark you put on the rod before taking it out is probably on the correct side, esp. with a NIB engine. But not always...sometimes they do it wrong at the factory, and sometimes those NIB engines are assembled out of new parts,  by a rank amateur.   :-\ Steve
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Offline RandySmith

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Re: ??Question of the day???
« Reply #3 on: May 12, 2011, 04:16:22 PM »
Quote from: Bootlegger on May 12, 2011, 11:42:58 AM
#^ #^     Pulled down ST 60 for general inspection, now looking at the rod for chamfer to slip on the crank, both sides seem to have the same chamfer.
  I looked at the rod to see if there is some sort of mark indicating whet side goes toward back plate and see nothing..!!
   What and where is the indicator to let me know how to re assemble the engine correctly...
       Thanks, Gil

Most but not all ST 60 rods have a clearance ground into one side of the bottom of the rod on the side, I have never seen a Stock ST 60 rod that was chamfered on both sides..thats a new one.
Is this a new motor?
does it have bushings in the rod?  top? top and bottom? none?

LOOK at your rod on the bottom at the side, if you see a relief ground into one side deeper than the other right where the round part starts at the big end, that relief side goes to the right looking in from the back of the motor

Randy


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Offline Bootlegger

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Re: ??Question of the day???
« Reply #4 on: May 12, 2011, 05:33:07 PM »
Fellow's thanks for all the sdvice. Randy I have looked and looked and cannot see any difference in the chamfer on either side, and yes they are NIB engines.
 I have put the rod back on the crank pin with the oil hole on the intake side as some have suggested.
 I really do appreciate all the advice from everyone.
 Randy what are your thoughts as to setting the rod up in the manner that I have??
  Thanks to all,Gil
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Offline RandySmith

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Re: ??Question of the day???
« Reply #5 on: May 12, 2011, 05:52:05 PM »
Quote from: Bootlegger on May 12, 2011, 05:33:07 PM
Fellow's thanks for all the sdvice. Randy I have looked and looked and cannot see any difference in the chamfer on either side, and yes they are NIB engines.
 I have put the rod back on the crank pin with the oil hole on the intake side as some have suggested.
 I really do appreciate all the advice from everyone.
 Randy what are your thoughts as to setting the rod up in the manner that I have??
  Thanks to all,Gil

Hi It is not the bronze bushing chamfer I am talking about, look on the side of the rod at the bottom end, right where the main part of the rod meets the rounded bottom end..on the sides, you will see where they are machined, one side will be machined deeper, that is the side that goes toward the right side when veiwed from the rear.
If there is no differance it doesn't matter

Randy
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Offline Bootlegger

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Re: ??Question of the day???
« Reply #6 on: May 13, 2011, 08:59:31 AM »
  Randy, there is a higher/deeper machine cut on one side, putting the rod on the crank pin this way puts the oil hole on the exhaust side of the engine.
  Thanks for your help...
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Offline RandySmith

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Re: ??Question of the day???
« Reply #7 on: May 13, 2011, 10:05:53 AM »
Quote from: Bootlegger on May 13, 2011, 08:59:31 AM
  Randy, there is a higher/deeper machine cut on one side, putting the rod on the crank pin this way puts the oil hole on the exhaust side of the engine.
  Thanks for your help...

Hi your welcome, that machined side goes as you know toward the right, or exhaust side

Regards
Randy
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