Can 165 & 3.0 swap?

[Cptkid570]

This may seem like an odd question.. but, if you have a boat that has the Mercruiser 165 MCM (4 cyl), is it possible (or a lot of work) to swap it with a 3.0 liter? Would you want to? I’m under the impression that the 3.0 liter is a better engine than the 165. They don’t manufacture the 165’s anymore do they? So, if the 3.0 isn’t a better engine, I would think that parts would be more available.

 

[Laddies]

Re: Can 165 & 3.0 swap?

It would also require a gear ratio change in the upper gearcase, the 165 was a were good engine, it was a case of GM stopping manufacture of it

 

[Alumarine]

Re: Can 165 & 3.0 swap?

I think he has the "other" 165. The 4 cylinder one.

 

[whywhyzed]

Re: Can 165 & 3.0 swap?

Your gear ratio would lend itself better to a V6 swap... The 3.0 would be a step backwards in HP

 

[Laddies]

Re: Can 165 & 3.0 swap?

Yup, I miss read the quistion and thought he was talking about a GM 165 not the Mercruiser junk, Sorry

 

[Cptkid570]

Re: Can 165 & 3.0 swap?

I thought the Mercruiser 165 had Ford parts inside of it.

 

[Laddies]

Re: Can 165 & 3.0 swap?

Yes the 4cyl. 165 has Ford, TRW and Mercrusier parts all in it when it first came out I wasn't to bad but the years and corrosion have turned most into junk

 

[Cptkid570]

Re: Can 165 & 3.0 swap?

That's why I was wondering how difficult it would be to convert into a 3.0. Are the rear mounts the same? Are the front mounts the same? I don't know anything about the 165 setup, but have seen some boats for sale (non-running) with a 165

 

[Bondo]

Re: Can 165 & 3.0 swap?

cptkid570,.........<br /><br />The 165 that you're talking about is Known as the Mercruiser 470,.........Actually,... It's got Lots of Names,......<br />But,.... Everybody "In the Know",... Knows What the 470 Is.......<br />Ya gotta Quit calling it a 165,..... There was Also a Chevy based 6 cylinder motor by That Name..........<br />It's a motor built by Mercruiser using Some Ford pieces,+ the rest is Merc.'s Own............<br /><br />Other than the fact that the 470,+ the 3.0l Both have 4 cylinders,+ Both say Mercruiser on them,........<br /><br />They have NOTHING in Common.............<br /><br />As stated above,..... The 3.0l is a BAD Swap......<br />The 4.3l is a Much Better Swap,.........<br />But,........ You'll Still end up Pulling All of the existing Motor,+ Throwing it Away.........<br />Then you can drop in a Complete 4.3l Engine Package...............<br />The Only Salvage you have is the Drive,+ Transom Assembly................. <br /> <br />Good Luck........