Firing problems

First off this my first post, I have a 1989? Pro V 150 the model on the ID plate is Pro V 150F. My problem is I've cleaned the carbs out (big help) the #1 cyl according to my timing light is right at #1 TDC. When I put it on #5 it'll read that cyl about 10 revolutions and without changing anything it'll jump to reading #2 cyl all by itself ?????????? It will not get on plane good at all. I put new plugs in it and pulled after about 30 minutes of running. #5 cyl plug was wet but very different from the rest? (firing problem) compression check all cylinders 120 psi give or take 2 psi. Any suggestions.

[boats.net]

You can swap #3 coil with #5 coil to see if it's a coil failure. The pulsor coil, charge coil and CDI output would need to be tested with peak reading volt meter to see if ok.

Firing problems

Thank you for responding, can I check the reading with a fluke volt meter? I will swap the coils to see whats going on. Do you know the degree of timing on this motor? And one more question is a 120psi cylinder check acceptable. I've fixed the tach since I had it out the last time so I'll know what it's doing a little better. Thanks Ray, I go through Lake Placid quite a bit, nice place.

[boats.net]

You can buy a DVA adapter for the Fluke meter and it works great.
Timing is -7 at idle and 28 degrees at wot.
120lbs compression is ok.

[99yam40]

No a Fluke will not work without a DVA (Direct Voltage Adapter), you can buy one or make one yourself. I found a couple of schematics in different forums that show different size capacitors and resistors and a diode.
I used a .47 uf 600VDC cap because that is what I could find and it gave me a close reading (within 6 volts at 200 v of a DVA meter that I borrowed to see how it worked)

Dumb question: can I put the throttle at wot adjust the flywheel timing at 28 degrees look at the mark on the bottom of the flywheel and and adjust the timing accordingly?

Well I set the timing like I had ask. It jump out of the hole a lot better. I ran it across the lake about 5 times the most rpm's I got get was 5500 is this right? I will be purchasing a manual on this thing this week. Thanks for all the info.