[elody69]

I have had a starting problem with my 90HP Mercury 4-stroke too. here are the facts:
1. About 120 hrs on the motor (2005) - 40 of them since Sept 1
2. Stopped the motor to watch the sunset and take photos, engine would not startup afterwards. No sound, no nothing
3. Nav lights worked fine - but I think were quite dim
4. Connected a batter charger while everything was connected. After appearing to charge for a brief time, used the remote trim up (on the Quicksilver console) and it operated briefly then quit.
5. Removed battery and put a charger on it overnight - didn't seem to be taking a charge (although now when I think about it it may've been charged - never tested it w/ a voltmeter
5. Replace the battery and no go. This time, not even the nav lights (and things that are normally on in the OFF position weren't there)
6. Inspected under the console - found a black wire with some melted insulation and bare spots. it's one of the wires coming from the ignition harness.
7. Ordered and installed replacement harness - and connected it across the deck of the boat (just to confirm that was it)
8. Still no go. Can't even use the cowl or remote trim up/down - as if there's no +12V power.
9. Fuses (all that I've found, anyway) - check fine. Several withing the starboard side's electrical panel - and one on the +12V connection at the battery. (there are two other connections in parallel - black wires with no apparent fusing).

[Tim]

I've got all of the test gear I think I need (test light, voltmeter, ohm meter). and am reasonably confident in reading a wiring diagram. It's tough sometimes though to make sure I've found the right part on the motor.

[cryptical]

Finally found a Mercury manual on-line,so that's been great help. more

[matsh]

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[dmytrij]

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[michelles]

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[K7Off]

#5 Post by babock » Wed Sep 23, 2015 3:23 pm here

[bradford1Merrill]

Personally, I would always make sure there is shrink sleeve on the cable connector. http://www.genuinedealz.com/custom-cables more

[ShadowOfHarbringer]

If you are going to use that diagram, I have one suggestion if you plan on using an onboard battery charger. Connect the ACR to the output of the switch. That way, the ACR won't combine with the switch off and the battery charger on. [links]

[td]

#2 Post by babock » Tue Sep 22, 2015 12:00 pm more

[icaro]

Long time lurker, first post.
I have a 2004 Sylvan 820 Mirage with a 75 HP Mercury 2 stroke. I have two fishing/ captains chairs in the front and a wrap around couch from the middle back. I also have a 22 gal gas tank and two batteries mounted in front of the motor.
My winter project is to rewire EVERYTHING as diagrammed by BobG (viewtopic.php?t=13546&p=105893#p105893). My question is; can I/ is it worth it to move my batteries to the front corners (inside custom speaker boxes in each corner) for the benefit of getting that 100 lbs on the front to help with weight distribution? My main concern with doing this would be my next question: will #2 battery cables be sufficient to carry the cranking amps for the motor from 18 ft away? [links]

[weddingshoesmaker2003]

They did like my idea of putting the ACR connections to the output of the switch if you are using a battery charger, especially a dual bank. Said they may incorporate that into a future drawing.

[eyu100]

Mercury FourStroke outboard motors are incredibly powerful and efficient, and they feature a wide range of applications. Crafted for less weight and high displacement, they generate abundant torque and immediate power. And because they don’t have to work as hard as heavier engines or those with lower displacement, they make boats plane faster and accelerate better, and they provide optimal fuel efficiency at cruising speed. here

[TORNS]

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[KarmicMishap]

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[Bth8]

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[todu]

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