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Post Options Post Options   Likes (0) Likes(0)   Quote Tonto2 Quote  Post ReplyReply Direct Link To This Post Topic: Help
    Posted: 14 Jun 2026 at 3:40pm
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Like a true muppet after cleaning the boat last weekend i must have left the key on and didn't isolate the batteries. Went to go fishing today and both batteries drained. I swapped out the batteries but now the engine will turn over but wont fire. Suspect i have burnt out the fuel pump. Does anyone have any specific knowledge? Its a F115 yamaha. Cheers
slowly going where everyone else has already been
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Post Options Post Options   Likes (0) Likes(0)   Quote smudge Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2026 at 3:50pm
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Moderator - Ninja
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Hi Martyn, my first thought in these situations is always 'is the kill switch in the correct position'? Are you in Pukekohe or thereabouts? If so I would be happy to pop out and take a look at some stage
Best gurnard fisherman in my street
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Post Options Post Options   Likes (0) Likes(0)   Quote Tonto2 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2026 at 4:05pm
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Hi Smudge, i checked the kill switch, currently charging the batteries in case the voltage was to low. I will give them a chance to charge. Might take you up on the offer after that. Im in Waiau pa. Thanks . Also due for a service so that might be a good opportunity to get it done in winter.
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Post Options Post Options   Likes (0) Likes(0)   Quote Tonto2 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 4:27pm
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Well thats weird just tried to start it and away it went.🤔. Wondering if the voltage was enough to turn it over but not run the fuel pump. Cheers anyway Mike. The fridge is usually stocked so you dont need an excuse to call in if over our way .🍺
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Post Options Post Options   Likes (0) Likes(0)   Quote Mc Tool Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 5:37pm
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Its possible that if the batteries were down a bit ....whilst cranking the voltage might have dropped enough to not wake up the ecu properly. I dont know your motor ....maybe marine is different but my Ducati wont power up the ecu (weber marelli ) if it doesnt see 9.5v whilst cranking . It will crank away slowly for a while just wont go .
I wish I was young again .... Id be heaps smarter than this time
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Post Options Post Options   Likes (0) Likes(0)   Quote Tonto2 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2026 at 8:42pm
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Yep, also had this on a holden commodore i owned. Cheers
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