Correct way to jump start 115 Yamaha Outboard

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Newman

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Evening all

Advice wanted on correct way to jump start a Yamaha 115 Outboard engine please

Have just bought a jump start from Halfords (Phaze 4 in 1 12v 17AH) and am in the process of charging it.

Instructions for use jump starting a car is to connect red to + on battery and - to metal structure. Does this mean connecting the - lead to the frame of the outboard or will + and - jump start leads go direct to boat battery + and - terminals ?

Many thanks in advance
 
I'd put -ve on the -ve of the battery personally. If the battery is earthed somewhere you could clip it to that I guess.

I wouldn't clip it to the outboard.
 
as above .make sure the crocs dont touch anything ,or if you are a fast swimmer i bump start my 225 yam
 
Well if you are seeing crocs seastoke no wonder you swim fast enough to bump start your 225 yam

Thanks for the replies so far. Appreciate the time taken
 
If you can easily get to the positive terminal on the starter & a good earth on the engine block, the neg terminal at the engine end would be ideal then you take out the resistance of the starter cables
Obviously if there hard to get at or your at sea & don't want to remove the cowl then the pos & neg on the battery will do
Sometimes taking out the volt drop from long starter cables & the isolator switch can make the differance between a successful start or not
 
if you are charging your jump starter it makes sense to charge your battery ,or you will have to run your engine for a fair while to get your battery full charged .or learn to swim fast
 
I agree it makes perfect sense to charge the boat battery but it was easier and more convenient to bring home the jump start than disconnect the boat battery and bring that home this afternoon (along with all the other odds and sods).

I have left a solar trickle charger connected to the boat battery to see how that helps. Checked before I left and it was showing 10.2 volts
 
Infrequent visits to the boat due to unavoidable commitments.

Being new to the boat and ignorant of such matters I noticed the voltage was dropping slightly (couple of weeks ago) and installed the solar charger via the cigarette lighter (and battery switch on to make connection). This weekend was surprised to find the voltage had dropped further and quite by chance heard a very faint whirring sound when checking inside the cockpit locker. Never had time to search thoroughly to see exactly what it was but am assuming it is a fan/blower.

Have now connected the solar charger direct to the battery via the live side of the battery switch and left it turned off.

Any further suggestions will be much appreciated, unless it is now assumed I am going down the right road (Fingers crossed)
 
I had an automatic bilge pump fail 'on' which drained my boat's battery. The pump is wired to be permanently live even if power is turned off. It now has a float switch too.
 
The whirring stops when I turn the battery switch off, which makes me think it is probably a fan to clear the locker area before starting the engine

Thanks for the info anyway
 
I will make a couple of notes from replies given and hopefully sort it out next visit to the boat. Thanks
 
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