85HP Force starts and runs for a few seconds then dies

Illin83

Recruit
Joined
Jul 21, 2019
Messages
2
I have a new to me bayliner with a force 85. When I picked up the boat it started and idled fine. Previous owner said the only issues he had was fouling plugs when trolling around. First trip out it ran well for 15 minutes then started acting up. Could only get 1/4 speed or so at full throttle, then proceeded to run worse until we towed to the dock. I assumed that there was crap in the tank and it made its way into the carbs.

Once back at home, I thought I found the problem, bad connection between trigger and power pack for cylinder #3. I repaired connection, then it wouldn't run at all. (no spark on #3). Realized that I messed up the repair, by connecting the wires from the trigger to the extra set on the pack (I had just matched colors). I wired it correctly and got spark back on 3, but still won't stay running. Just starts for a couple seconds and dies.

I pulled flywheel off to tape up a chaffed wire and found that the stator mounting bolts were loose and one was broken. Fixed this and still the same outcome.

Carbs are clean, fuel is kinda dripping out of them after I try starting a few times.

Compression is about 125 in all cylinders. Spark seems strong in all cylinders, haven't tried a spark tester though.

If I pull the third plug wire, it wont start at all. If I pull #1 or 2 then is will start about the same as if all three are hooked up. Weird thing is, is that if i swap 2 and 3 plug wires, it will still start run the same.

The pack for one and two has been replaced or repaired, the other one looks to be original.

I know this is a long winded question, but I am running out of ideas. I don't want to replace any high dollar parts til I have a better idea of whats broken. I don't have a book for this boat. All of the books I have had, have been terrible. They try to cover too many different years and models to be very helpful.
 

Illin83

Recruit
Joined
Jul 21, 2019
Messages
2
Well I'm and idiot. I had the fuel line hooked up to some other barbed fitting near the bottom carb (not the fuel rail). Explains why switching 2 and 3 didn't matter. I'm glad I wasted pretty much the entire day messing around with the ignition system.
 

Jiggz

Captain
Joined
Oct 23, 2009
Messages
3,909
So is the motor running fine . . . and doing at least 4500 RPM at WOT?
 
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