There is no difference other then the possibility of a different ratio
Most will be different ratios if installed on the same model boat, but if different boats can have different ratios
Ayuh,...... Welcome Aboard,.... The housings should be the same,....
The gear ratios will be different though,.....
The I-4 should be 1,98:1,....
The I-6 could be 1.84:1, or 1.65:1,......
Ayuh,.... Then you'll need to drop some prop pitch,.....
Donno how much though, depends on which ratio the drive is,.....
What prop pitch were you running on the I-4, when it had the proper ratio,..??
Hopefully, you'll be able to find a prop small enough,.....
Ayuh,.... Then you'll need to drop some prop pitch,.....
Donno how much though, depends on which ratio the drive is,.....
What prop pitch were you running on the I-4, when it had the proper ratio,..??
Hopefully, you'll be able to find a prop small enough,.....
Might even think about not doing it depending on what boat it is. If the boat is heavy for a 6cyl then it will be a dog with a 4cyl, even with less pitch
