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  1. RideNFishCA

    2005 Merc 115 won't go full throttle

    2005 Merc 115 4 stroke 1B158433 ELPT4S Won't quite go full throttle (no tach on boat) but runs smooth. Doesn't stumble. I was having this problem with a slight surging. I can back off throttle from full a bit then go back wide open and get 1 second of more rpm then back down again. I'm down...
  2. RideNFishCA

    Why can't I find wire diagram from 2005 115 4 stroke?

    I have been searching and searching for a wire diagram for my engine to no avail. 2005 115 elpt four stroke 1B158433. My year is the Yamaha power head (pretty sure). I think I found a diagram to buy on ebay but don't know why I just can't buy or look one up that has been posted. Any help...
  3. RideNFishCA

    No Warning Horn at All

    2005 Merc 115ELPT4S four stroke 1B158433 - First time boat owner. No warning horn, ever. No short beep at start up or otherwise. I removed forward controls (side mount) and made sure purple wire was hot with key on. I grounded tan/blu wire and horn went off. I am worried that previous owner hid...
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