2001 Utopia 185 and 2002 Utopia 205 engine swap, is that possible?

[Finey]

Hello everyone, I have a 2002 utopia 205 with a mercury 240hp efi, this engine is toasted, oil pump failed and 2 pistons have now 0 psi result on a compression test, I just found a 2001 utopia 185, the engine looks different compared with the 205, my question is: will be a simple replacement if I remove the utopia 185 engine and install on the utopia 205 or I’ll find incompatibility at some point?

 

[ripcuda]

Hi. Sorry to hear about your 240efi. Sadly, not uncommon. Do you know the engine in the 185? I'd guess the mercury 210 carb'ed version... but possibly the 200hp Optimax?? The 210 would swap (same block/jet pump as 240efi)... not positive about the Optimax (are those the 3.0L blocks??) Engine cover (flywheel cover) should say which version.

 

[Finey]

I requested a picture of the engine and he send me this one:



Searching on internet I found the information that this may be the Mercury 240 EFI, But my engine is also the Mercury 240 EFI and looks different the top cap and the flywheel, and some others details like alternator and oil tank position.


this is my engine to compare:

 

[ripcuda]

Yes. Both of these are 240efi engines. The non-alternator version is the gen1 (I have this in my boat). The alternator version is the gen2 (your engine). These engines can be swapped... same block... same jet pump. The gen2 has some differences. Alternator, newer different ECU, electric oil pump, single throttle-body intake manifold.

You will need the complete engine, wiring harness, ECU from the gen1 to do the swap. gen1 240's have a crank-driven oil pump that is a known failure point. It is highly recommended to remove the oil pump (delete block-off kit) and premix oil into the gas. Otherwise it should be a pretty straight forward swap.

Good luck.