1972 Mercruiser 165.

[Rranger]

Any other Mercruiser engines that if the 165 was removed would bolt up to the 165’s rigging? Looking at a boat with a failed 165.

 

[ROY WILLIAMS]

Any other MerCruiser engines that if the 165 was removed would bolt up to the 165’s rigging? Looking at a boat with a failed 165.

model 165. 165HP,250CU.IN.,6 CYL PISTON, COMPRESSION PRESURE 140 PSI., PLUG AC-MR43-T, NO 6DEG BTDC YES 2DEG BTDC, ENGINE OIL 5QT,

 

[Bt Doctur]

any GM inline 6 cylinder that has the 2 threaded holes to the left of the timing chain cover for the front motor mount.
poss replacements the in line 4 FWC mercruiser ,shorter than the 6, would need to fab up a new front stringer
then a v6 ,would need to fab up new front stringer motor mounts
drive gear ratio will work with all three 1.65-1

 

[Scott Danforth]

I personally would drop in a 292 and fabricate a new motor mount if wanting to keep the original transom shield or outdrive.

a new 4.3 / A1G2 long-tail will drop in with minimal work to the transom and mounts

then again, a 5.7 or 6.2 / A1G2 long tail would also drop in (and still weigh less than the inline 6)

 

[Scott06]

Any other Mercruiser engines that if the 165 was removed would bolt up to the 165’s rigging? Looking at a boat with a failed 165.

Nothing directly -a 3.0 is drop in most easily but will make less power.

A 3.0 is shorter so front motor mount will need to be moved back.

4.3 is probably the best if there is room in the engine compartment but will require glassing in side motor mounts. the 4.3 replaced the 165 in the merc line up in the mid 80's and makes similar or more power.

Is the 165 rebuildable?

 

[kenny nunez]

Both 250 & 292 in line 6’s that came from a truck have the extended tab on the starboard side of the timing cover. A passenger car engine block will work after making an extension to the mount along side of the pan rail.