My 2 bobs worth- like thee volvo sea instead of the pricey non drip( google yachting boating world forum)
Also how on earth can you load up 4 engine mounts equally? Three yes, but 4 is just guesswork for the last one. Adjust number 3 good but it takes all the weight and leaves nothing for number 4 to take.
Just slightly unclear about your post.
You need to keep the engine mounts all close to the same load shared across all of them. Easy to do. Measure the thread on each. If the engine is slanted down, the mounts are usually fitted as such. Cross ways, the mounts will be the same heights, but there could be small variances longitudinally.