Yanmar TDC Timing

/ Yanmar TDC Timing #1  

mark777

Veteran Member
Joined
May 16, 2004
Messages
1,300
Location
S.E Texas
Tractor
Ym1300d-1401D-1601D , 1610D & Massey Ferguson 1020
O.K. Folks...I should probably know this, but only think it's true. Are all Yanmar engines #1 cylinder at the back (flywheel side) ?

Everything I've read, worked on and seen, including a few 3 digit made for America Yanmars indicates the #1 cylinder at the rear. I have just been into a 3T75U engine on a YM1610 and everything indicates the camshaft has been timed (to the crankshaft) to the forward cylinder, #3 at TDC.

It's obvious that someone has been into the engine before me, and I'm thinking they have timed it off the wrong cylinder....it does run but poorly with no power. Am I wrong here??

Thanks for any input, Mark
 
/ Yanmar TDC Timing #2  
mark777 said:
O.K. Folks...I should probably know this, but only think it's true. Are all Yanmar engines #1 cylinder at the back (flywheel side) ?

Everything I've read, worked on and seen, including a few 3 digit made for America Yanmars indicates the #1 cylinder at the rear. I have just been into a 3T75U engine on a YM1610 and everything indicates the camshaft has been timed (to the crankshaft) to the forward cylinder, #3 at TDC.

It's obvious that someone has been into the engine before me, and I'm thinking they have timed it off the wrong cylinder....it does run but poorly with no power. Am I wrong here??

Thanks for any input, Mark

You are right as far as I know.

Danny
 
/ Yanmar TDC Timing
  • Thread Starter
#3  
Thank you Danny...I really needed to hear that :). Now I am comfortable with pulling the rocker assembly and camshaft and re-timing correctly.

Mark
 

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