timing setting

[Onexl85]

Do all mercruiser 5.7 sbc have the same idle timing setting of 10 degrees btdc? it is a thunderbolt 5 ignition

 

[flipbro]

8 dbtdc

 

[Onexl85]

If my mechanic is setting it at 10, could that cause sluggish starting?

 

[Scott Danforth]

If my mechanic is setting it at 10, could that cause sluggish starting?

yes to some extent, however depends on the motor.

 

[Onexl85]

the engine cover says 10 btdc but the engine cover was replace by the previous owner that's why I think they are setting it at 10
The serial is 0f881527

 

[Onexl85]

Thanks guys, sure enough it was a 10 degrees

 

[NHGuy]

My TB V says 10 degrees. Don't forget to ground the purple & white wire before you start the motor. Set the timing when it's warmed up and the idle is 725. Then turn off the engine before removing the ground.