2-stroke/4-stroke 25hp motor

[daddy]

Go with the 4-stroke if for nothing more than the decreased noise. The fours are very quiet.

The two-stroke may have a bit more shit to it but in a little boat like that, I'd go with the 4-stroke, hands-down.

 

[99sierraman]

An interesting article:
Article

 

[CJ Hungus]

That is a pretty interesting read.... hmmmm.

 

[cRiPpLe_rOoStEr]

I'm more favorable to the 2-stroke ones. About pollution: Evinrude addressed this issue in the E-TEC range with direct injection (developed by the Australian company Orbital Engines). The oil doesn't require to be pre-mix, it has a separated tank for.

 

[Longshot270]

Good article but since I'm also toying with the idea of a small boat, it makes the decision harder since both technologies have come so far.

 

[cRiPpLe_rOoStEr]

2-stroke has a good power-to-weight ratio and less complexity to deal with. Easier maintainance is a good feature to cut running costs...

 

[CJ Hungus]

I'm more favorable to the 2-stroke ones. About pollution: Evinrude addressed this issue in the E-TEC range with direct injection (developed by the Australian company Orbital Engines). The oil doesn't require to be pre-mix, it has a separated tank for.

Hmmmm, I didn't know they did away with mixing the gas. I thought you still had to. Plus one for the Evinrude.

 

[Zembonez]

My last two 2 stroke motors (150HP and 200HP) both had oil injection. No mixing. Next boat will be 4 stroke for sure though. The difference in smelling the exhaust is amazing... plus you aren;t dumping oil into the combustion chamber and into the water.

 

[cRiPpLe_rOoStEr]

Some newer synthetic oils already turn the exhaust smell difference into nearly zero.

 

[CJ Hungus]

My last two 2 stroke motors (150HP and 200HP) both had oil injection. No mixing. Next boat will be 4 stroke for sure though. The difference in smelling the exhaust is amazing... plus you aren;t dumping oil into the combustion chamber and into the water.

Evinrude claims that all the oil is burned up in the combustion chamber.....