Merc 40-50 hp efi conversion

Jerfish1

Recruit
Joined
Jan 8, 2019
Messages
2
I’ve seen thread on changing carbs on the carb models of the 40-50 hp because the motor numbers are all the same except the fuel delivery (carbs and such) but what about the efi 4 stroke it also has the same block but I want to know if changing the injectors , removing the intake restrictor and the ecm to a 50 hp and put them on my 40 would be all that would make it a 50 hp please help just need a little more power for when I take an extra person on my boat to get on plane. I’d like to keep the boat pitched how it is it does fine with just me in it but added weight really affects it
 

flyingscott

Fleet Admiral
Joined
Apr 8, 2014
Messages
7,985
By rhe time.you do all that it would be cheaper to replace the motor with a bigger one.
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,589
Need to 50 hp camshaft too...time you buy the parts it will be cheaper to trade it in on a bigger HP
 
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