MerCruiser 3310-805924A2 05924A MerCarb 140hp 3.0LX 4cyl Carburetor Carb 1990-95 Grab Handles The Part number for Aluminum

The Part number for Aluminum Exhaust manifold is 93173-C / 816219C (Stamped) / 816219A1 / 816219A5 ---- Found on all "470" models 1985-1989

Yours should looks just like this

This is the earliest exhaust elbow they made of this style

but I doubt these are compatible with most gauges as these were not common and I don't think you can just add them to just any standard gauge

This would have been compatible with all of the standard GM & Ford 2

MerCruiser 3310-805924A2 05924A MerCarb 140hp 3.0LX 4cyl Carburetor Carb 1990-95 Grab Handles The Part number for AluminumPart Number(s) Included 3310 805924A2 3. 0LX Carburetor (Casting number on the bowl is 05924A2 & 3401) Superseded Equivalent: 3310 805924A2 3310 807504A1 > 3310 864940A03 > 3310 8M0045397 2 Barrel (2BBL) MerCarb Carburetor General Application Compatibility This would have been found on MerCruiser GM 3. 0LX Models ONLY 1990 1995 S N 0C856559 0D447414 and 0D836076 & Up SN 0D447415 0D836076 used a different carburetor (3310 80677A2) ***Not a suitable