timing procedure

[leeann4]

just anouther timing question.<br />merc 260 5.7 thunderbolt 1V <br />what is proper procedure to time . i cannot get timing to 8* i keep reading about grounding wires. what wires am i supposed to ground in order to get base timing? complete tune up was done at start of spring. also cannot get idle down to 750rpm.

 

[newport dave]

Re: timing procedure

There is no wire to ground or anything on a Tbolt IV. You just hook up the timing light. But you will have to get the RPM down to 650 or so before you can accurately set the timing. <br /><br />Dave

 

[Don S]

Re: timing procedure

Try disconnecting your throttle cable. Then use the adjustment on the carb to get the proper idle rpm. Then adjust the cable to ad just a little pressure on the linkage toward the idle position.<br />As Dave said, you need to get the idle down to set the timing.