During my regular engine compartment check I found a bolt lying under the oil pan. On closer inspection I was surprised to find it was one of the 4 countersunk allen key setscrews that hold the engine mount bracket to the engine block. (This is the assembly bolted to the engine block upon which sit the flexible engine mounts). See photo. They are very difficult to tighten due to limited access and limited pressure you can apply to a short allen key.

I was however more concerned to find that two of the four 17 mm bolts, which are above the setscrews and also fix the brackets, were also loose. On very close inspection it was obvious that the block has been moving slightly against the starboard bracket.

The problem is that there is very limited access to the general area but more importantly there is virtually no access to the bolts as there has only been a small slot made in the bracket to allow the bolt to be inserted.

It is not possible to fit a socket spanner in there and I will have to grind down a ring spanner to get it into the slot, Even then there will be limited room to move the spanner. Thus I doubt whether I will be able to really tighten them.

I will do the best I can and apply a thread lock compound.

It seems to me a poor design feature and the reason they are loose is that it was difficult to access during assembly of the motor.

It might be worthwhile to check yours as my engine has only done 150 hours.

Any comments/suggestion are welcome.