Was out over the weekend with my 1994 Johnson 50/35 jet. Was running fine the first few hours, then I took off, got on plane and all of a sudden it bogged out. Couldn't get over 3200 rpm's. Got home compression tested great (150 top, 149 bottom), tested spark and couldn't get spark on bottom cylinder, AHHA!! Swapped plug wires a few different ways, and it seems the bottom coil main is the problem. Proceeded to test ignition coil and got .4 -.5 ohms on primary resistance (coil main to ground), should be .1 (+-.05). Got this reading on both mains. Secondary resistance tested fine. But I think I have a problem with my ohmeter. Set to test at 200 ohms when I touch the black and red leads together it reads .3 ohms. Shouldn't that read 0? If so, then minus .3 from the readings I'm getting would give me .1 - .2, seemingly within specs. Also if I'm not getting spark on just the bottom cylinder, why would both top and bottom coil mains read the same? Wouldn't the bottom read different? I'm a bit confused.
Sooooooo, do I have a bad coil? If not, what should be my next test? Power pack? If so, I'm not sure how to test that.
Thanks for any help/insight into this problem!!!
Sooooooo, do I have a bad coil? If not, what should be my next test? Power pack? If so, I'm not sure how to test that.
Thanks for any help/insight into this problem!!!