View Single Post
Old 10-31-2017, 06:53 PM
d2jp's Avatar
d2jp d2jp is offline
MC Fanatic
Join Date: Jun 2011
Boat: 1992 PS 205-351w,285HO
Location: Smith Mountain Lake, VA
Posts: 913
Originally Posted by Tmac in Folsom View Post
Question: my original Pleasurecraft manual says to set timing at 6 deg BTDC; why are you guys recommending 10 deg BTDC?

Would it change the timing at all because I've replaced my old Prestolite "points" distributor with the new PerTronix Billet disti?
According to the good folks at SKIDIM:
"1986 - prior for a 351 PCM should be set at 6 degrees BTC @600 RPM. PCM 351's 1987 and later should be set at 10 degrees BTC."

I would go with what your manual says, assuming it's the correct manual for your year engine. It doesn't hurt to try anything between 6 and 10 degrees - and you should be able to find the sweet spot somewhere in there. After setting it, disconnect your throttle cable and increase your RPMs a touch, you should see the timing mark advance.
1992 ProSport 205
(Former) 1989 ProStar 190 Power Slot
Smith Mountain Lake, VA
Reply With Quote