What rating fuse should I use? :) (PIC)

[ollyit]

Bearing in mind that I'll be using 8Guage wiring from the battery direct to the outboard, - Many thanks

[ollyit]

also using a brand new 85amp Marine Leisure Battery

[SDGANDER]

Just had a look at my mariner 30 and there doesn't seem to be any fuse in that line. The engine cables are moulded onto the battery connectors and the engine connectors on the other end...

SG

[ollyit]

Oh right, not sure is that a good thing? - or does your outboard have an earthing strap under the hood that'll blow if needed - bit like a car setup?

[Jono]

Originally Posted by ollyit

earthing strap under the hood that'll blow if needed - bit like a car setup?

Que? Blowing earthing straps? I must be getting out of touch with car electrics... don't they use common/chassis grounding/return any more? Doesn't the earth strap between the engine and the chassis/ body carry the full cranking current? Have I slept/drunk through this change?
Am I the only one who uses dual pole isolation switches?

[SDGANDER]

Agree it not the best electrical practice!

Just checked the workshop manual and only fuse isbetween the starter solenoid and the rectifier.

My car has a fuse in the starter circuit - think its around 60 A. So I guess you would need to find out the maximum current it will draw or charge at and use a fuse with a slightly higher rating.

SG

[Mark Halliday]

Ollyit

Are you trying to fuse the main feed to the starter? If so, forget it.
If I have missed the point, what are you trying to protect?

[ollyit]

Just my lack of knowledge getting in the way then, sorry just being over cautious - I'll feed the power straight to it then - just wasnt sure what circuit protection my 2 stroke yamaha 60 has

[Mark Halliday]

No probs. A fuse there will only protect the wire as far as the starter solenoid.

See you and pics on the 11th.

[Jono]

Ollyit,
With respect, if you have little knowledge of electrical circuits, it may be an idea to get someone more knowledgeable to "show you the ropes". It isn't rocket science but you do need to have a healthy respect for it. Sorry to sound patronising, but it is one of, if not the biggest cause of fires...

[Mennojsh]

you can put an 150 or 100 amp littlefuse near the battery
this wil protect your main wires
they will cost about 8 euro with the fuse holder

9 of the 10 boats don`t have a main fuse
you don`t realy need him but what happens when the + cable on the engine got loose or when the isolation of the wire come off

good luck menno

[ADS]

Originally Posted by Jono

Ollyit,
With respect, if you have little knowledge of electrical circuits, it may be an idea to get someone more knowledgeable to "show you the ropes". It isn't rocket science but you do need to have a healthy respect for it. Sorry to sound patronising, but it is one of, if not the biggest cause of fires...

If all you are doing is installing the engine I would have a go yourself first before calling someone in -its not that complicated. Its only when you start wiring in £1500 worth of colour chart plotter I would get worried. When I put my engine back on the boat after taking it off for some hull work when i reinstalled it I wired it back up almost by trial and error! First time I tried it, when I turned the igntion on the bilge pump light came on!

[ollyit]

thanks for all your advice, I do feel competant enough to carry on the installation still, Was just being over caucious, safety first nall

thanks again - Olly

[chrisallse]

[ashbypower]

I can

Brian