First post, new member, go gentle
I have just bought a boat, it's not a rib (that's coming later!) which has the above engine. We believe it to be a 1989 model.
Having a slight problem with it, sometimes when the key is turned, the engine will not even attempt to start, no click from the solenoid, starter does not engage.
The Battery has been charged and is in good condition, I'm fairly good with electrical systems, so have performed a few tests..
Have tried the usual test of jumping the solenoid to crank over the engine, this works.
Measured the input terminals on the solenoid when the key is turned, I read no voltage.
measure from the positive terminal on the solenoid to one of the earth braids, I read 12v
It's almost like the negative side has no earth, but I can do a continuity test between parts of the engine and the negative terminal and others I can't (If that makes sense)
It's almost like there might be some sort of safety interlock somewhere that prevents you from starting the engine with the cover off??
After much faffing about like this, I looked at the front plate that covers the catches of the engine cowling, noticed the two metal prongs at the bottom that lock into the engine, I wondered to myself if the interlock (if there is one) is made only when this cover is put on, so I snapped the cover on (without the cowling) and tried again, still nothing, I then put the cowling back on and tried again, this time it worked!
I can't explain this, unless there is some kind of interlock. Does anyone have any experience of this? It seems unusual to me.