7.4L Inboard Engine Mount

wileecoyote

Member
TECHNICAL Contributor
Oct 18, 2008
949
Southern MD/ Potomac river
Boat Info
1989 340 EC
Engines
7.4LX2 Hurth 630A Drives
6.5Kw QS Genny
The Merc parts catalog lists a 816326A2 for my motor mounts. There doesn't seem to be a whole lot of availability for this part. Does anyone know if this has been updated or superseded?
Does anyone know what the specs may be before I try to measure it and find a match? It seems that 2 of mine are spinning the rubber in the base and therefore I cant adjust it.
I'm trying to center the shaft in the shaft tube, and it seems to be a bit low, as if the whole engine needs to go up.

 
I found mounts that appeared to be the same dimensions as the ones in the boat. The company was Bushings Inc. Heres the email I received when I asked if they were direct replacements.
DF-216 (see attachment) is the recommended replacement mount for your engines. For pricing and order placement please visit our online distributor, go2marine.com

I installed them the other day and they fit exactly the same as the ones that were already in the boat. Surprisingly, once I removed the old mounts, they had Bushings Inc stamped on the base. I'm sure they were replacements as I can't imagine Merc wouldn't grind that away to charge the extra $100 they list them for.

This is for the 3/4" shaft mounts, which I assume is the difference between these and the 5.7 mounts? They both have a 4" spacing between the mounting holes.
 

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