more timing issues

milkman250

Seaman Apprentice
Joined
Apr 28, 2011
Messages
48
So I'm looking at service manual and it has a chart, I think its saying at 1000 rpms timing should be at 6*btdc. I set mine at 550 rpms and when I throttle up to 1000 my timing is at 14*. If anyone could please clarify for me, am I reading the chart rite if any one else has manual or just knows
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: more timing issues

Sorry, but my crystal ball is cracked, so, if you would put the important information like engine, drive, serial numbers, year and that sort of thing in your signature, we would know what you are working on.
 

gbeltran

Petty Officer 1st Class
Joined
Jul 12, 2009
Messages
283
Re: more timing issues

You're reading it right. At idle, it should be 6 BTDC. It shouldn't start advancing until 1000 rpms. Could be the springs in the distributor are getting weak. Full advance should occur at 3200 rpm. I think I'd set the timing so it's 18 degrees at 3200 rpm, and check it at idle. If it's where it needs to be, say + or - 2 degrees I'd just run it and enjoy it.
 

milkman250

Seaman Apprentice
Joined
Apr 28, 2011
Messages
48
Re: more timing issues

Thanks for the clarification, at 1500 rpms it is already advanced to 18*. I took a look at the springs and they are different from each other, is this right or should they be the same? I can move rotor by hand with a little pressure and seems to return fine. Is it going to affect the engine with it advancing so quickly. One of the guys at the marine shop here said he would sell me a complete distributor that's wires to coil and eliminates the use of points for a hundred bucks, is that a route I should take...thanks for any info
 

proshadetree

Lieutenant Commander
Joined
Jul 19, 2008
Messages
1,887
Re: more timing issues

There is a trick to wire the omc shift interrupt with electronic ignition. My points have lasted for years just get new and dwell them. My springs were different on my 350 dizzy too.
 

gbeltran

Petty Officer 1st Class
Joined
Jul 12, 2009
Messages
283
Re: more timing issues

Thanks for the clarification, at 1500 rpms it is already advanced to 18*. I took a look at the springs and they are different from each other, is this right or should they be the same? I can move rotor by hand with a little pressure and seems to return fine. Is it going to affect the engine with it advancing so quickly. One of the guys at the marine shop here said he would sell me a complete distributor that's wires to coil and eliminates the use of points for a hundred bucks, is that a route I should take...thanks for any info

You know, is your boat running fine right now, with the exception of the timing coming in too quickly? I wouldn't mess with it, I think your chasing something that isn't there. You could put some stronger springs in to slow it down. Yes, for that there should be two different springs, the curve isn't linear, it's also possible someone got in there and tried to mess with the curve.
 
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