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Mercury OB starter issues

Pharcta2

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Pharcta2 Collaborator

Pharcta2

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Hello all. I have a '99 Merc 75 ELPTO. I noticed last fall that it has a dead spot on the starter. No biggie, just pop the cowl, rotate the starter a bit, and off she goes. I stuck the repair on my "I'll get to it list"...
Took it out Saturday (9th time this year) and she started fine. Took off from the launch, and tried to trim.. No go. Turned the engine off to take a look - BAD IDEA. She wouldn't turn over anymore.

Anyway, I decided maybe it was my starting battery. When I went to put the cables onto one of my trolling motor batteries, the battery was extremely hot. I put the cables on, tries the t and t, it worked fine. Tried the starter, just a little whirring noise, and the deep cycle battery was smoking!

My rudimentary knowledge of outboard repair leads me to think this is most likely a dead short in my starter. Does this sound plausible?

Sorry for the long post!

Thanks for any and all advice in advance!

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Knotwood Enthusiast

Knotwood

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Do a compression test to make sure you have no leaks into the combustion chamber, they should all be within about 10% of each other. It could be a slight hydraulic lock keeping the engine from spinning over. Water or excessive gasoline mix will not compress like air, and can jam starters up. It sounds like the starter is fried, though. Anything that draws enough amps to get a battery smoking indicates some kind of severe load or a direct short.

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fishermn Proficient

fishermn

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This definitely sounds like a shorted stator. Be real careful in such a situation if you reconnect it again, that much load on a battery can cause an the battery to fail, sometimes catastrophically.

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Pharcta2 Collaborator

Pharcta2

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Thanks for the advice - in a way, everyone was correct in their diagnosis. As it turns out, the boat took a lighning strike sometime between uses, which cause a whole bunch of electrical bug-a-boos.

Thanks for all the advice!

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    • Macgyver55
      Random Daily Pics

      By Macgyver55 · Posted

    • smurfy
      Just Food and Drink

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      By The way that didn't work either!! Screw it I'll just use the cellular. 
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      It’s done automatically.  You might need an actual person to clear that log in stuff up.   Trash your laptop history if you haven’t tried that already.
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      I grilled some brats yesterday, maybe next weekend will the next round...  
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      By Mike89 · Posted

      good luck!!!   
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      we had some nice weather yesterday and this conundrum was driving me crazy  so I drove up to the house to take another look. I got a bunch of goodies via ups yesterday (cables,  winch ratchet parts, handles, leaf springs etc).   I wanted to make sure the new leaf springs I got fit. I got everything laid out and ready to go. Will be busy this weekend with kids stuff and too cold to fish anyway, but I will try to get back up there again next weekend and get it done. I don't think it will be bad once I get it lifted up.    For anyone in the google verse, the leaf springs are 4 leafs and measure 25 1/4" eye  to eye per Yetti. I didnt want to pay their markup so just got something else comparable rated for the same weight.   I am a first time wheel house owner, this is all new to me. My house didn't come with any handles for the rear cables? I was told this week by someone in the industry that cordless drills do not have enough brake to lower it slow enough and it can damage the cables and the ratchets in the winches.  I put on a handle last night and it is 100% better than using a drill, unfortatenly I found out the hard way lol and will only use the ICNutz to raise the house now.
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      By Wanderer · Posted

      I haven’t done any leaf springs for a long time and I can’t completely see the connections in your pics BUT I I’d be rounding up: PB Blaster, torch, 3 lb hammer, chisel, cut off tool, breaker bar, Jack stands or blocks.   This kind of stuff usually isn’t the easiest.   I would think you would be able to get at what you need by keeping the house up with Jack stands and getting the pressure off that suspension, then attack the hardware.  But again, I don’t feel like I can see everything going on there.

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