Compatible? Mercruiser 165hp vs 190Hp (3.7l)

[gost]

Hi all, as my present engine Mercruiser 3.7l 165hp -87 is knocking, I've plans on buying another one. I have found a 3.7l 190hp I guess from -89.
Are they compatible? regarding cooling motormounts and so on?

 

[achris]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Are they compatible? regarding cooling motormounts and so on?

The short answer is 'yes'. The only difference is that the 190 has a bigger carb and redesigned exhaust, other than that they are identical.

Chris...........

 

[gost]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Thanks, so I guess I only have to look for the common problems, leaking waterpump, alternator, an 3 or 4" cooling?

 

[achris]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Don't quote me on this, but I think the 190s came standard with the 5" heat exchanger....

Chris................

 

[gost]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

No other who knows? or have done this swap?

 

[gost]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Just wanna bring this to the top.

According to www.mercruiserparts.com they seems to be compatible?, but 190hp seems older than 165hp.

I need help in this so I dont buy an incompatible engine - anyone?

 

[Bondo]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

They only built those motors for a Few years,...... They're All pretty much the Same.......

 

[gost]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Pretty much the same? Of what I can find the difference are Carburetor and fuel pump.
Anyone who knows the answer to my question - are 165hp and 190hp compatible? meaning can I replace a 165hp with a 190hp engine?

 

[Big Boat Bay Buster]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

If just changing the long block, should NOT be a problem. Check over at Breezeworks.
http://www.breezeworks.net

 

[gost]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

Thanks for the reply, but the the engine I'm planning to buy are a complete engine with careburator and alternator and so on, but I guess that changes nothing?

 

[achris]

Re: Compatible? Mercruiser 165hp vs 190Hp (3.7l)

It will be a straight drop-in replacement.

Chris.........