nigel
New Member
I'm trying to set the timing on my 1998 2bbl 4.3L 190hp carb engines but can't find the timing mark scale - all I have is a tab with a notch in it. There is no scale on the damper either - just one very thin line.
What do the notch and line indicate, if I align them? TDC? Or are they positioned so that aligning them gives the correct timing - i.e. 10deg BTDC?
Does anyone know if Merc have changed the timing spec for these engines? - I heard that many engines have had their timing changed to 4deg TDC from 8deg to compensate for rough fuel quality.
Whilst I'm writing - The centre bolt on my damper appeared loose so I tightened it up as high as I could - about 50lb ft - without clamping the engine to stop it rotating. But would you expect this bolt to move anyway relative to the crank as part of the damper's normal operation?
Many thanks in advance for any help you can give!
Cheers,
Nigel.
What do the notch and line indicate, if I align them? TDC? Or are they positioned so that aligning them gives the correct timing - i.e. 10deg BTDC?
Does anyone know if Merc have changed the timing spec for these engines? - I heard that many engines have had their timing changed to 4deg TDC from 8deg to compensate for rough fuel quality.
Whilst I'm writing - The centre bolt on my damper appeared loose so I tightened it up as high as I could - about 50lb ft - without clamping the engine to stop it rotating. But would you expect this bolt to move anyway relative to the crank as part of the damper's normal operation?
Many thanks in advance for any help you can give!
Cheers,
Nigel.