No spark to starboard bank.

[scottpellegrin]

1993 150hp Evinrude VE150GLETG. This engine has a shift switch on it that cuts spark to half the engine while shifting to ease the load on the driveshaft. My question is, will it always cut spark to the same bank or will it alternate banks? With the switch connected it will not fire on the starboard bank if I unplug one of the two wires it will fire on all six. If I completely remove the switch the engine will run great but when I turn the key off the engine keeps running but it runs as if the spark is really weak. I say this because there is a significant change in the way the engine sounds, but it stays running with the key off. Another question I should ask is how dose the switch work? Is it a normally open or closed switch? Or is it something totally different than that? Please help me understand this system better.

 

[Joe Reeves]

Re: No spark to starboard bank.

By removing the switch, you are somehow eliminating the kill circuit between the powerpack and the ignition switch. As such, turning the key off is killing the ignition to only one bank. Install a new switch.

The same bank is "always" affected..... which is the starboard bank.

The purpose of that shift interupter switch is to allow the engine to shift from either gear into neutral, not to ease pressure upon the driveshaft. There are various propellers that exert so much pressure upon the clutch dog engagement of the gears that, should that interrupter switch not exist to momentarily cut the power, it would be impossible to get the engine out of gear.

 

[scottpellegrin]

Re: No spark to starboard bank.

Thanks Joe for helping me understand what is going on and how it works. I'm the kind of guy that cant sleep when I'm unable to figure out things.