Tohatsu 2stroks conversion

[marinero11]

Helo gays my cuestión is if could convert my 2 strok brand new tohatsu outboard 4HP to 6 HP for my new skiff boat and if is ok what y have to do. Regards and thanks

 

[pvanv]

3r4032001m

carburetor assy, mfs/nsf6a2

$127.25

That is for the 4 stroke. In north america, 2-strokes have been obsolete for decades. When we did have them, Tohatsu had a 3.5 and a 5. No 4 hp version in 40 years.

 

[marinero11]

Sorry in australia this motor reading owners manual model M 4C output kw 2.9 (hp) what is the real h p of this outboard and please it can convert to 6 HP thanks

 

[Sea Rider]

If 2 strokes nope, can upgrade a 4 to a 5 HP as both shares same CC powerheads. Can upgrade a 6 to an 8 or a max 9.8 HP as all 3 shares same larger CC powerheads compared to the previous mentioned models. Only need carb swaps for next higher HP models along increasing some degrees the current timing advance. More fuel intake needs slight more time advance setting, a matter to check the Service Manual for tech specs for each mentioned HP models.

Buy a 5 HP carb, install an induction tach, go for a wot spin and check if the motor runs at least towards it's middle rpm range, surely not with a factory delivered prop, if so, will need to go for a prop maximization to a less pitch for motor to run towards its max rpm range and get the max HP out of the updated 5 motor.

Happy Boating

 

[marinero11]

Thanks mate I ll have to replace bouts .carvi and prop to get the vest power Cheers Carlos

 

[Sea Rider]

Thanks mate I ll have to replace bouts .carvi and prop to get the vest power Cheers Carlos

You're welcome. My 2 strokes Tohatsu 5 HP motor has been prop maximized with one less pitch from factory delivered one for motor to run to its full 5500 wot rpm range, better pushing along less motor effort is oustanding. Highly recommended..

Happy Boating