Help
Printed From: The Fishing Website
Category: General Forums
Forum Name: The Boat Shed
Forum Description: Discuss all things boating.
URL: https://www.fishing.net.nz/forum/forum_posts.asp?TID=140146
Printed Date: 02 Aug 2026 at 7:15am
Topic: Help
Posted By: Tonto2
Subject: Help
Date Posted: 14 Jun 2026 at 3:40pm
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
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slowly going where everyone else has already been
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Replies:
Posted By: smudge
Date Posted: 14 Jun 2026 at 3:50pm
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
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Best gurnard fisherman in my street
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Posted By: Tonto2
Date Posted: 14 Jun 2026 at 4:05pm
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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slowly going where everyone else has already been
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Posted By: Tonto2
Date Posted: 15 Jun 2026 at 4:27pm
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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slowly going where everyone else has already been
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Posted By: Mc Tool
Date Posted: 15 Jun 2026 at 5:37pm
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 .
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I wish I was young again .... Id be heaps smarter than this time
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Posted By: Tonto2
Date Posted: 15 Jun 2026 at 8:42pm
Yep, also had this on a holden commodore i owned. Cheers
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slowly going where everyone else has already been
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