wot timing questions

[luisdiaz]

I am doing the WOT timing method of John Reeves. How can I tell if my engine has "Fast Start feature"? The engine is a J70PLSIS, 2001.
My spark tester is for one spark. Should I ground the other 2 or I need to get 2 more spark tester?
Thanks

 

[SKEETR]

Re: wot timing questions

That is a good question. However I believe you only need the tester on the #1 wire that the timing light is hooked to. As far as the fast start feature I'll let someone more exp. chime in on that one.

 

[ezeke]

Re: wot timing questions

QuikStart or FastStart systems have powerpacks that automatically advance the timing for a cold start. Once the engine temperature exceeds 96 degrees +/-, the advance is relaxed and the engine idles noticeably slower.

In addition to the normal tan wire, the temperature switch on these sytems will usually have an additional black and white wire that runs to the powerpack. You can usually disable the QuikStart advance by disconnecting the black and white wire and grounding the powerpack section of the black and white wire to the engine block.

 

[luisdiaz]

Re: wot timing questions

Thanks for reply EZEKE and SKEETR.
If the temperature switch is at the left of the top cylinder, yes it has two wires and one is black and white. So it has a fast start and will have to disable it. There is a picture of what am pretty sure is the temperature switch, please advice if am wrong. Thanks again.

About the two other sparks my concern is that according the seloc manual in the instructions of measuring the compression of cylinders if you leave the sparks wires just loose and the coil may no discharge, you risk to damage the coils (or the power pack, am not sure). The truth is that accidentally I left a spark plug unplugged a couple of days ago, turned the motor on and nothing got damaged (thanks God). Do not know if I was lucky or if it will never get damaged that way. What do you think?. I was thinking to take the other two sparks out, plug them to the coils and ground the body. Or buy two more spark testers. I can not take any risk at this time because weekend is too close sea conditions will be perfect and there is fish waiting for me, don't want to be rude and let them waiting
Thanks for your help.

 

[ezeke]

Re: wot timing questions

Your picture shows the temperature switch with the two wires.

Edit: Quote "About the two other sparks my concern is that according the seloc manual in the instructions of measuring the compression of cylinders if you leave the sparks wires just loose and the coil may no discharge, you risk to damage the coils (or the power pack, am not sure). The truth is that accidentally I left a spark plug unplugged a couple of days ago, turned the motor on and nothing got damaged (thanks God). Do not know if I was lucky or if it will never get damaged that way. What do you think? "

Don't risk blowing the powerpack, pull your emergency kill lanyard and it will supress the spark. You can still crank the engine with the ignition switch for your compression test.

 

[luisdiaz]

Re: wot timing questions

What do you mean with pull your emergency kill the lanyard? I am not interested in doing compression test. Am doing WOT timing using Joe Reeves's method. If suppress all of the sparks, wont be able to see the timing with the timing light. At least top cylinder spark must be on. True?
Thanks.

 

[ezeke]

Re: wot timing questions

For Mr. Reeve's timing method, you will need to ground the spark plugs to the engine block in such a manner that the spark will be as far from the spark plug holes as possible. You can use a tester or improvise. Obviously you cannot have the plugs in or the engine will start.

 

[luisdiaz]

Re: wot timing questions

Perfectly understood. I already got two more spark tester so will go that way. Should be able to do it before Saturday. Will re post with results.
Thank you very much.

 

[luisdiaz]

Re: wot timing questions

My WOT timing is not being stopped. Doing Mr. Reeves's method I just realize that. My motor wot timing is suppose to be 17btdc (-4 that would be 13). Right now is reading 28. That is the maximum of the scale. That make sense to me because the wot timing is at is max (not being stopped).
What does not make any sense to me is that it was running fairly well before I started the carburetor service. Am 99.9% sure I did not play this screw at all. As far as I understand (not much) carbs would have little if not no effect on it. Right or Wrong? Make sense?
Just to double check.
1. The black and white wire from temp sensor that goes to power pack was shorted to ground.
2. The timing was pushed all the way forward and tied there.
3. The 3 sparks at 3 testers.
4. Controls were at neutral so I could crank the motor.
5. Timing light at top cylinder
6. Crank the motor.
Should I just start to screw the adjustment until I get 13 (17-4)?
Or am I missing something?
Thanks.

 

[SKEETR]

Re: wot timing questions

It sounds like quickstart is still activated. You need to ground the wire from the pack not the one from the sensor.

 

[luisdiaz]

Re: wot timing questions

You are right, thanks for that. I was just going to post about that. I have being doing some troubleshooting. I had learned a bit of it. I was grounding at the pack. The problem is that it does not make any difference when grounded or not. What tells me that the pack circuit is not working in that section. I could be wrong but this is how do I got to this conclusion.

I check that sensor was open when motor is cold. I turned the motor on and let it warm. Shut it off, check sensor and now it is closed. Checked the timing in both cases warm and cold and it was the same. Plug off the sensor, turn on motor, check timing, grounded black and white wire (at the pack) while the motor was on and still get same revs and same timing. I also did make sure the black and white wire has continuity to the pack.
My question was going to be,
What difference in degrees (or revs). should be seen between quick start on and quick start off? Now, you pretty much answered that question by telling me that it can make this huge difference in the wot timing.
If am right and the input of the circuit is not seeing the sensor (or the output do not care) (I have no way to know because the circuit is sealed) then my must important question would be. How can I disable the output of the quick start circuit?
Thanks a lot for your help, really appreciate it.

 

[Bear 45/70]

Re: wot timing questions

Do NOT ground the plug wires! Either put spark plugs on them and ground the base of the plug to the engine or go buy a couple of cheap spark testers at Harbor Freight. Grounding just the wire is as bad as leaving it open as the system is not designed to operate that way and can blow the pack.

 

[SKEETR]

Re: wot timing questions

It is not just as bad, it is far worse to leave a plug wire ungrounded or not hooked up to a spark tester. As to weather a grounded wire actually does harm a pack, I have never heard that before.

 

[luisdiaz]

Re: wot timing questions

Actually I used 3 spark tester. One per spark plug. Separation was 7/16 in each. It was pretty cool to see them sparking as the motor was cranking. I could not do the wot timing at cranking speed but for sure I learned a lot in the process. For that I thank everyone in this forum who helped me through and of course to Mr. Reeves for his method. Am pretty sure that if I could defeat the quick start feature as stayed in Mr. Reeves method it would be done already.
To all of you, be blessed by the LORD.

 

[Bear 45/70]

Re: wot timing questions

It is not just as bad, it is far worse to leave a plug wire ungrounded or not hooked up to a spark tester. As to weather a grounded wire actually does harm a pack, I have never heard that before.

Then you never attended an Johnson/Evinrude O/B factory factory school. In fact Mercury said the same thing.