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Tohatsu 3.5 (M3.5A)

Discussion Forum at MarineEngine.com » Nissan Tohatsu Outboard » Tohatsu 3.5 (M3.5A) « Previous Next »

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martin everett
Member
Username: meverett

Post Number: 7
Registered: 10-2008
Posted on Thursday, August 27, 2009 - 08:23 am:   Edit Post Delete Post View Post/Check IP

I am trying to remove the gearbox (It is the model that is always in gear), removed the 2 bolts but something else is holding it on, driveshaft? Is there anything else that needs to be removed?
The number printed on it is 309 28428, any idea of year?
Many thanks for any info.
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Tohatsu Guru
Advanced Member
Username: tohatsu_guru

Post Number: 915
Registered: 06-2007


Posted on Saturday, August 29, 2009 - 09:53 am:   Edit Post Delete Post View Post/Check IP

Just the two leg bolts. The year would be difficult to determine because it pre dates current records....But its an 80's model
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martin everett
Member
Username: meverett

Post Number: 8
Registered: 10-2008
Posted on Saturday, August 29, 2009 - 11:21 pm:   Edit Post Delete Post View Post/Check IP

Thanks for that.
Do you know the fuel ratio for this model.
I was told it was 100:1 but after looking deeper I found it should be 50:1. I'm now not sure what it should be.
Many thanks again.
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TGuy
Member
Username: tguy

Post Number: 31
Registered: 11-2008
Posted on Monday, August 31, 2009 - 10:07 am:   Edit Post Delete Post View Post/Check IP

all Tohatsu 2-strokes use a 50:1 mixture
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Tohatsu Guru
Advanced Member
Username: tohatsu_guru

Post Number: 924
Registered: 06-2007


Posted on Thursday, September 03, 2009 - 02:55 pm:   Edit Post Delete Post View Post/Check IP

On a side note....They were originally designed for 100:1, but it didn't leave much of a safety margin so the requirement was set at 50:1. At 50:1 you get that protection edge if the cooling system fails.

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