Tohatsu 40 HP TLDI

[weedeater]

Originally Posted by 1fastmerc

You talking bout the 3cyl 2 stroke Mercs they don't make anymore.


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yep both of them being the older style 2stroke 3cylinder 40hp

[SULPHITE]

Originally Posted by 1fastmerc

You talking bout the 3cyl 2 stroke Mercs they don't make anymore.


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gots me one of those...been a good motor

[la_suthrn_soldier]

I have a M40C Tohats 40 hp, single carb model, Just completely rebuilt by Jerry's Marine in Gonzales,La. My question refers to getting more punch from it. From what i am reading all i need to do is Swap carb, reeds and exhaust and essentially i have a 50 hp? I am mechanically inclined just not very knowledgeable on this motor yet... thanks for ll y'alls help..... Oh and we cought some reds this past weekend in haymark fishing gulp under a popper off the marsh cuts. Cought between 9AM and 11AM each day

Corey D

[CajunChristian]

Not really, you have a M40C, that C designates it as a 2 cylinder outboard. Everyone else is talking about the M40D converting to a 50. The D designates that motor as a 3 cylinder.
Your M40C is a 29 cubic inch, 2 cylinder, single carb, Japanese commercial fishing motor.
The M40D is a 3 cylinder, 3 carb, 42.5 cubic inch recreational use outboard.

The first class I raced was Sport "C", the C designated the max cubic inch allowed was 30. The 2 cylinder Tohatsu dominated that class. The fastest I ever got mine to run was 60 mph. That is with a total, after race, weight of 650 pounds.
Look up Sport C on youtube.
D

[la_suthrn_soldier]

Yeah.. after posting that i went and started referencing parts and realized they do not match up! So what options do i have with my C, if any???

Corey

[1fastmerc]

Originally Posted by weedeater

yep both of them being the older style 2stroke 3cylinder 40hp

Then that's an easy decision.


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[weedeater]

Originally Posted by 1fastmerc

Then that's an easy decision.


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that question was directed at someone that has dealt with both and who would know...... not assume from what they have heard

[1fastmerc]

Originally Posted by weedeater

that question was directed at someone that has dealt with both and who would know...... not assume from what they have heard

You have an uncle that got rid of a brand new tohatsu for a Merc because his brothers Merc would run circles around his tohatsu.


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[CajunChristian]

There is no replacement for displacement! If I had a choice of either of those motors, the Black motor would be mine without a second thought.
D

[1fastmerc]

Originally Posted by CajunChristian

There is no replacement for displacement! If I had a choice of either of those motors, the Black motor would be mine without a second thought.
D

Agreed X100000000000000


+1


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[weedeater]

Originally Posted by 1fastmerc

Agreed X100000000000000


+1


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so when you gonna bring yours to someone and get it fixed

[swamp snorkler]

So a 1994 M40D can be turned into a 50 hp?

What kind of cost is involved in that? Is it worth it to do to a 19 year old motor. My coworker has one.

[CajunChristian]

Originally Posted by swamp snorkler

So a 1994 M40D can be turned into a 50 hp?

What kind of cost is involved in that? Is it worth it to do to a 19 year old motor. My coworker has one.

Yes it can, but, I would guess that corrosion has gotten the better of that motor. Nearly all of the Megas have had block replacements, they were 93 models. It started about 4 or 5 years ago. The block corrodes around the sleeves so badly, the head gasket won't seal. All of the water jacket cover bolts break off when you try to remove them, makes it kinda futile to spend that much money on a unit with a very limited life span.
D

[Clafleur]

For a little while I was thinking this one would end up in the gill net

[la_suthrn_soldier]

So to those of you who know about these tohatsu's, are there any options for my M40C? Or is it pretty much where its gonna be... im hoping for some way to squeeze a little more out of it, i have a lot of money in it now.

Corey

[CajunChristian]

Originally Posted by la_suthrn_soldier

So to those of you who know about these tohatsu's, are there any options for my M40C? Or is it pretty much where its gonna be... im hoping for some way to squeeze a little more out of it, i have a lot of money in it now.

Corey

PM sent.
SD