Where is 8* BTDC??
#1
Where is 8* BTDC??
I've exhausted my search options on all of the interwebs. I'm setting base timing on my Merc 350 MAG MPI. Its a 0L372*** era motor, year 1999. I found a million threads on how and have the service manual. I though I completely understood how to do this procedure until I went to do it. My issue is that I see my mark on the balancer and see the mark on the plastic timing cover, but doesn't this indicate TDC #1? Shouldn't there be a larger tab on the timing cover to indicate degrees BTDC and ATDC? I looked at google images and could find nothing. The timing cover is just a small "V" shaped notch. The balancer does not appear to have any other markings unless I'm missing them. Please help.
#2
Registered
iTrader: (1)
To make sure, what does your distributor cap / rotor look like ?
#1)
or #2)
#1)
or #2)
#3
Platinum Member
Platinum Member
iTrader: (6)
from TDC on the balancer ( should be a line 0 ) there should be small dash lines before and after TDC, if for go back four notches before the TDC line, that is 8* before, each dash line is 2*,
Last edited by F-2 Speedy; 07-08-2016 at 07:51 AM.
#4
You can use a timing light with an advance knob, or if you don't have one or any marks, 8 degrees before would be about 9/16" to the right of the top dead center mark on the balancer (for an 8 inch balancer).
#5
Charter Member #1171
Charter Member
Thats the easiest way,,,,, but there should be another timing mark on the balancer as well
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Last edited by obnoxus; 07-08-2016 at 08:13 AM.
#8
Registered
Buy ya a timing tape. Their available at most auto parts stores. Make sure you get one for the correct diameter balancer. http://www.jegs.com/p/Mr-Gasket/Mr-G...46079/10002/-1
#9
SB, my distributor is picture number 1. It does require that base timing be set for this model. My balancer does not appear to have any hatch marks. I am putting the ECM (MEFI 3) into base timing mode by jumping pins A And B at the diag connector. I don't have an advance timing light. I guess I'll pick up some balancer timing tape. Thanks for the all the advice. This is what I was missing. Funny that so many other threads here and forums ask how to set base timing but nobody asked this question.