new motor mounts

[JD-MDR]

I 'm trying to figure out if these mounts are in correct. I'm thinking the aft ones should be rotated for maximum adjusting potential. Please respond. Thank you

I guess you have to zoom in to see. .The slotted holes are all forward. It seems to me like the aft ones should be aft. I let the yard guys have this job and this is what they sent me this morning. They are installing the engine now.

[tkeithlu]

This appears to be a Z drive, such that the back end of the engine is towards us, and the prop shaft lies under the engine.

I think that it is absolutely gorgeous machine work, and I don't think you have anything to worry about, at least yet.

[Jim Cate]

Looks like there will be limited access to the packing gland... have you (they) worked that out?

Jim

[JD-MDR]

Thanks Jim. Packing gland is not an issue I replaced and extended the shaft log several yrs ago and I can service that easy. I just got back form Mexico and the motor mounts Installed in November didn't hold up. I did make it back luckily. Ive been informed that the position of the slots of the motor mounts will not affect it enough to worry about.

[Jim Cate]

^^^^^

Good one! That is an enviable and tidy engine bay... wish mine was as clean!

Good luck with the installation and launching.

Jim

[JD-MDR]

Thanks guys for responding.. I'm still curious if I was correct in questioning the orientation of the slotted holes.. If I had just a tiny bit of sideways adjustment I might have been able to keep my original mounts with just some retapping of the bolt holes. Here is the photo of what the yard did in November . I guess they didn't tap those holes out to a larger size.

[JD-MDR]

and here is what the alignment looked like at Cabo San Lucas

[tkeithlu]

The shaft of each mount is half way between the round hole and the slot. Reversing them, with the shafts in the same neutral position, does not result in more lateral adjustment.

[kmacdonald]

Originally Posted by JD-MDR

Thanks guys for responding.. I'm still curious if I was correct in questioning the orientation of the slotted holes.. If I had just a tiny bit of sideways adjustment I might have been able to keep my original mounts with just some retapping of the bolt holes. Here is the photo of what the yard did in November . I guess they didn't tap those holes out to a larger size.

Is the stud broken where it enters the mount? It looks offcenter in the picture.
Thats where they almost always snap. If it snapped, go up one size stud. Unfortunately that requires new mounts and often different dimensions so its not a simple swap.

[JD-MDR]

Originally Posted by kmacdonald

Is the stud broken where it enters the mount? It looks offcenter in the picture.
Thats where they almost always snap. If it snapped, go up one size stud. Unfortunately that requires new mounts and often different dimensions so its not a simple swap.

Those "Vetus" mounts were put in in November. Didnt break. I think they used the old holes . I wanted them to tap them one size larger. I don't think they did. Also those mounts don't have the slot for lateral adjustment. In the photo of the shaft coupling I see that the engine needed to be moved sideways.

[kmacdonald]

Originally Posted by JD-MDR

I 'm trying to figure out if these mounts are in correct. I'm thinking the aft ones should be rotated for maximum adjusting potential. Please respond. Thank you

I guess you have to zoom in to see. .The slotted holes are all forward. It seems to me like the aft ones should be aft. I let the yard guys have this job and this is what they sent me this morning. They are installing the engine now.

I dont think it matters if the slots are forward or aft. What is important is the allignment. The shaft coupling can move port-starboard and up-down. Make sure its centered. If its not it will wear the cutlass bearing unevenly.

[kmacdonald]

Originally Posted by JD-MDR

Those "Vetus" mounts were put in in November. Didnt break. I think they used the old holes . I wanted them to tap them one size larger. I don't think they did. Also those mounts don't have the slot for lateral adjustment. In the photo of the shaft coupling I see that the engine needed to be moved sideways.

The slotted ones have very little adjusting room. The mounts will have to be mounted to the aluminum base very accurately. You could also slot the aluminum base if necessary.

[kmacdonald]

The adjusting stud should be 5/8". The bolts holding the vetus mounts to the aluminum base rarely fail and I would guess 1/2" would be fine.

[JD-MDR]

Originally Posted by tkeithlu

The shaft of each mount is half way between the round hole and the slot. Reversing them, with the shafts in the same neutral position, does not result in more lateral adjustment.

Thats the way I understood .. Thanks..

b

[kmacdonald]

For what it's worth, the new job looks good so far. The alignment is the critical part though. If that goes as well as what they have done so far it will be good.