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Old 28-10-2014, 04:42 PM   #1
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yamaha 70 help

Looking at getting a small battery just for starting the engine, anyone recommend one? It's on a thundercat so I'll need to waterproof it, the more compact the better.
And if anyone knows where to get boyesen reeds in the UK for a yam 70 that would be helpful too!

cheers
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Old 29-10-2014, 12:37 AM   #2
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Quote:
Originally Posted by roflhat View Post
Looking at getting a small battery just for starting the engine, anyone recommend one? It's on a thundercat so I'll need to waterproof it, the more compact the better.
And if anyone knows where to get boyesen reeds in the UK for a yam 70 that would be helpful too!

cheers
Shorai or Ballistic Lithium battery

Should be able to get Boyesons from any Tohatsu dealer but would recommend CCM.
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Old 29-10-2014, 12:08 PM   #3
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Shorai or Ballistic Lithium battery

Should be able to get Boyesons from any Tohatsu dealer but would recommend CCM.
cool thanks, any idea what size battery I would need? I've never had electric start on an outboard before!

I've sent CCM an email

cheers
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Old 17-06-2015, 03:18 PM   #4
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wiring

Anyone know about wiring on these?
I'm going tiller control and pull start only, so a lot of the wires will be obselete I think. I have no idea which ones I need/don't need or where they need to go. I'll be needing the kill cord on the tiller.
If anyone can point me in the right direction I'd really appreciate it.

These are the ones leaving the engine to the controls:

Theres a yellow, green, white, red, brown, blue and black. That's about as much as I know about wiring!


The one on the left here I think is the limiter (covered in red tape), grey wire coming from the CDI box
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Old 17-06-2015, 09:50 PM   #5
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Yellow 12v ignition on
Red 12v permanent
Black earth
Blue choke
Green tacho feed
White kill switch
Brown starter feed.

Whoever put those cheap crimps on needs a good seeing to. Decent heatshrink sealed ones are only a couple of pence each.
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Old 17-06-2015, 09:55 PM   #6
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Yellow 12v ignition on
Red 12v permanent
Black earth
Blue choke
Green tacho feed
White kill switch
Brown starter feed.

Whoever put those cheap crimps on needs a good seeing to. Decent heatshrink sealed ones are only a couple of pence each.
So with pull start, no trim, no battery etc. Where should I connect each wire?

Rough action plan
Pink wire - leave alone
Blue wire - remove, going to try and make a manual choke mechanism
Brown wire - remove
Yellow wire - remove
Green wire - remove (using a tiny tach)
Black wire - Shorten and use an earth on the engine
Sky blue wire - remove
Light green - remove

Red stripe wire - can I remove this? I have no battery. Or do I connect it somewhere else to provide voltage to the coils?

White wire - leave alone, see if I can make the killswitch work

Seem like a reasonable plan?

Yes I agree about the heatshrink! It was covered in tape as well, done before I got it.

Thanks very much for the help
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Old 17-06-2015, 10:21 PM   #7
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You don't need any of those wires to get it to run with no control box connected. Trim them all down and insulate them apart from the white and black which you will need for the kill switch - the switch shorts the White to the black to kill the engine. You shouldn't need to worry about the pink for warning circuit as the CDI should drop cylinders and limit revs if you do overheat.

Manual choke - looks like you have round bowl carbs - does the CES tray have the rectangular hole next to where cables come through for the manual choke. If you still have choke butterflies you just need the manual pull choke and linkage which will operate them. I probably have a few if so.
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Old 17-06-2015, 10:23 PM   #8
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You can also ditch the rectifier as won't be charging. Just disconnect the two green wires from stator and remove the rectifier.
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Old 17-06-2015, 10:36 PM   #9
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Exactly the kind of information I'm after! thanks very much

I don't think there is a rectangular hole, just the slot for the cables. I'll double check tomorrow, but it still has the choke butterflies.
I have yamaha 90 carbs to go on, also round bowl, but I want to get it going with the standard carbs first, although the linkages are seized.

Excuse my ignorance - is the rectifier the small black box under the CDI? Can I remove the lighting coils from beneath the flywheel?
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Old 18-06-2015, 10:14 AM   #10
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Schematics & Parts for 70CES:

http://static.gjoel-marinecenter.dk/...106J2100E1.pdf
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Old 18-06-2015, 01:39 PM   #11
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Removed a lot of the electrics today, starter, solenoid, electric choke, rectifier and lighting coils all gone.

@Phantom 19 - Is this the hole you are meaning?



Be great to get a manual choke mechanism for it

Cheers
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Old 18-06-2015, 01:40 PM   #12
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Wicked thanks! I know a few other guys who will appreciate this too
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Old 18-06-2015, 02:09 PM   #13
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Yes the manual choke fits in the square hole I will look this evening for one.
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Old 18-06-2015, 02:13 PM   #14
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Yes the manual choke fits in the square hole I will look this evening for one.
Cool, thanks mate
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Old 18-06-2015, 05:28 PM   #15
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Anyone know which bits I need to get the cables to work?
Here's what I have at the moment, the small clip fits over the cables



Thanks again
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Old 18-06-2015, 06:30 PM   #16
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theres a small metal plate with a slit which sits just behind the rubber bit holding the wires in place!
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Old 18-06-2015, 06:44 PM   #17
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Quote:
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Anyone know which bits I need to get the cables to work?
Here's what I have at the moment, the small clip fits over the cables



Thanks again

Items 16 & 17 on Page 15 Fig 8 - Bottom Cowling

Keanaz
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Old 18-06-2015, 11:31 PM   #18
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Quote:
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theres a small metal plate with a slit which sits just behind the rubber bit holding the wires in place!
Cool, any idea where I can find them?

Quote:
Originally Posted by Keanaz View Post
Items 16 & 17 on Page 15 Fig 8 - Bottom Cowling

Keanaz
I've got those bits, and I thought that was all I needed but the part of the cable that gets clamped is much further inside the engine, so there must be another bracket I think.
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Old 19-06-2015, 04:15 PM   #19
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I have photos of how it should go but for some reason I can't post them on here. I can email them.

Is there specific Yamaha control cable, maybe your cable is different
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Old 20-06-2015, 09:24 PM   #20
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Quote:
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I have photos of how it should go but for some reason I can't post them on here. I can email them.

Is there specific Yamaha control cable, maybe your cable is different
cool, sent you a PM
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