Jimbo, none of those sound like small jobs. (frownyface). Spybot, no, the coil hasn't come in. But I did grab a coil off the donor motor. I had to solder the right connector onto the wire. But it didn't arc, and it did jump a spark across 1/2". So it's probably good for testing, anyway.
I posted another thread about some unusual test results, I thought might indicate a dead sparkplug. I learned that I was using the spark tester wrong. I might have a bad sparkplug, or I might not. My test just didn't prove anything.
So now it's back to the waiting game. It will be a couple of weeks before I get back to the boat to run more tests. I'll probably buy one new plug to take with me for more testing.
I said before that I thought it was fuel related. Now I'm not sure. It misfires at all RPM, so any fuel related cause would have to be independent of the jets. Is that right? A low speed jet clog would run fine at open throttle, and a mid-jet clog would run rough at mid speeds, and a high-speed jet clog would run poorly at mid and high speeds. So a clog that made the engine run rough at all speeds would have to be upstream, in the float-bowl valve, or fuel pump. Or an air leak upstream of the fuel pump. I've chased all of those problems already. I could certainly have failed in my efforts, but I think it's more likely that fuel restriction is not the issue. I think that as long as I have probable electrical issues, I can discount fuel. Please chime in if you think this paragraph is bunk.
Electrical failures causing no-spark in one cylinder would almost perfectly explain most of my symptoms. So I'm going to keep chasing ignition until I can rule it out.
Anybody have a good test for spark plugs? Is it just continuity through the center, and gap to the ring? These aren't resistor plugs, are they? How much resistance indicates failure? The Service Manual only describes visual inspection for cracks in the ceramic.
Main ingredients are Sheeps Heart Liver and Lungs mixed with oat meal and cooked in a sheeps stomach.
