Hi,
I've got a set of 2006 150's and smartcraft tach's/speedo setup.
The engines each have their own battery and on/off switch and are intended to be on isolated circuits. In a round-about way I found one of them had popped a fuse - trouble-shooting that further I found through the wiring harness the engines/starting-batteries are getting paralleled. So basically if you only turned one battery on, and tried to start or trim the engine with it's battery off, you end up feeding that engine through the other engines wiring harness (and popping the fuse). Similarly if you had a half dead battery and hit the starter, it would probably popped the fuse on the opposite engine.
A side effect of this is the batteries are parallel anytime the engine battery switches are on, and therefore voltage reads the same (or if one batteries dies then both end up the same).
Trouble-shooting the source of the problem - there is a smartcraft hub where the gauges are fed and engine wiring harness's for gauges plug in. It's within that hub that it's paralleling the engines - by disconnecting one engine from the hub the issue is resolved; by resolved I mean the engines are isolated and I can't feed power through the opposite engines harness anymore, but then the gauge for one engine has no signal inputs (but does turn on and has power fed from the other engine).
I did also try just disconnecting the speedo (which has signal from both engines going into it and was where I thought the problem was) but that does nothing, so it's the hub that is causing the problem..
Is this a setup problem, like for twin engine installs is there something that should have been done differently?
Theoretically I could figure out what the power feed is into the smartcraft hub, cut that for one engine, and similarly cut it on the gauge side, then connect those two together (so the power for one of the engines goes around the hub and directly to it's gauge). Any idea what color wires I should be hunting for?
Trying to figure out the "right" way to fix this before it finds a way to leave me stranded, destroys something, or starts a fire.
Thanks,
Jon
I've got a set of 2006 150's and smartcraft tach's/speedo setup.
The engines each have their own battery and on/off switch and are intended to be on isolated circuits. In a round-about way I found one of them had popped a fuse - trouble-shooting that further I found through the wiring harness the engines/starting-batteries are getting paralleled. So basically if you only turned one battery on, and tried to start or trim the engine with it's battery off, you end up feeding that engine through the other engines wiring harness (and popping the fuse). Similarly if you had a half dead battery and hit the starter, it would probably popped the fuse on the opposite engine.
A side effect of this is the batteries are parallel anytime the engine battery switches are on, and therefore voltage reads the same (or if one batteries dies then both end up the same).
Trouble-shooting the source of the problem - there is a smartcraft hub where the gauges are fed and engine wiring harness's for gauges plug in. It's within that hub that it's paralleling the engines - by disconnecting one engine from the hub the issue is resolved; by resolved I mean the engines are isolated and I can't feed power through the opposite engines harness anymore, but then the gauge for one engine has no signal inputs (but does turn on and has power fed from the other engine).
I did also try just disconnecting the speedo (which has signal from both engines going into it and was where I thought the problem was) but that does nothing, so it's the hub that is causing the problem..
Is this a setup problem, like for twin engine installs is there something that should have been done differently?
Theoretically I could figure out what the power feed is into the smartcraft hub, cut that for one engine, and similarly cut it on the gauge side, then connect those two together (so the power for one of the engines goes around the hub and directly to it's gauge). Any idea what color wires I should be hunting for?
Trying to figure out the "right" way to fix this before it finds a way to leave me stranded, destroys something, or starts a fire.
Thanks,
Jon
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