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Old 05 March 2009, 07:16   #1
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Country: UK - England
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Changing engine - bolt hole differences

I'm considering the idea of upgrading my engine in the not too distant future to something newer and maybe a bit bigger. Even if I can get the broken bolts out of my old one, I think it might be time to upgrade. I currently have a 70hp tohatsu and would ideally want a 90hp but would be looking for anything between 70 and 115hp.

It would be good to get another tohatsu as I guess it'll bolt straight back on the transom with no need to change anything but will any other makes also fit the bolts holes I already have? If not, what is the best way to block up the old holes and what happens if the new holes are too close, or overlap the old ones?

My ideal engine would be a 90hp tohatsu TLDI so if anyone spots one second hand then please PM me straight away!

Thanks,

Tim
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Old 05 March 2009, 07:42   #2
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Just about anything will fit. The vast majority use the the same layout for the mounting holes.
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Old 05 March 2009, 07:54   #3
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now that is interesting to know, do you happen to know what the exceptions are?
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Old 05 March 2009, 16:23   #4
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Old stuff - pre mid '80s. They harmonised after then, which made life a lot easier.
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Old 06 March 2009, 03:11   #5
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I switched from an old premix rude to a 91 st oil injection Yammy and it went straight into the same holes.

Ian
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Old 06 March 2009, 09:32   #6
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I just helped a friend do that from a Tohatsu 50 to a 90 - went straight in - didn't even need to adjust the cable linkages.....It even used the same electrical plugs!

So yes, it sould fit.
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Old 12 March 2009, 17:47   #7
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I was in exactly same position as you. Opted for the 90 2-stroke over TLDI due to cheaper servicing, parts etc. Main advantage was ability to keep all exisiting instruments and just plug new engine in!

I think the TLDI had the same bracket, can't recall what the dealer said but if you go to tohatsu website you can download the dimensional drawing of the brackets for all the models so you can do a quick compare!

(also note you need a beefy battery for the TLDI as it doesn't generate any net current when it's idling)
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