Should motor die when plug boot is pulled?

[johnmark]

I have a 1983 johnson 50 hp (J50BELCTA). I was reading Joe Reeves post in the FAQs section and he states "When running the engine, pulling each s/plug boot terminal off of the s/plugs should result in a even rpm drop throughout." Well on mine if I pull the boot completely off it kills the motor. ether plug. the motor runs fine idles @ 750 rpms . just wondering. Thanks Guys, John

 

[wilde1j]

Re: Should motor die when plug boot is pulled?

Two cylinder motor?

 

[johnmark]

Re: Should motor die when plug boot is pulled?

Yes.

 

[Vic.S]

Re: Should motor die when plug boot is pulled?

An even drop then. 750 to zero! try it at a slightly higher speed.

 

[crxess]

Re: Should motor die when plug boot is pulled?

LOL

What Vic said. You are trying at to low an idle.

 

[johnmark]

Re: Should motor die when plug boot is pulled?

Thanks Guys she's running fine right now. I'll leave it be for now,I had this motor runaway on me before and don't need to chance that when nothing seems wrong . Thanks again,John

 

[Sea18Horse]

Re: Should motor die when plug boot is pulled?

If it's a single coil with two plug wires then pulling one plug wire off will kill both cylinders. With those you need to do it a different way. It's best to get a couple of short lengths of 3/16 vacuum hose and plug them on to the ends of the plugs and stick the plug boots onto those. Then take a 12v test light (grounded to the power head somewhere) and ground each plug out one at a time by touching the vacuum hose with the probe.

Cheers.......................Todd

 

[Vic.S]

Re: Should motor die when plug boot is pulled?

If it's a single coil with two plug wires then pulling one plug wire off will kill both cylinders

It isn't, it has two separate coils (see the parts catalog diagrams) However that's useful info that I had not realised. Thanks. Always little snippets to learn.