Yanmar Saildrive

[Danny_Labrador]

I am looking for a engineering drawing or a good diagram of a Yanmar sail drive (typically fitted to a 4 cylinder diesel on a yacht 10 years ago).

Any suggestions ?

I know that there is a rubber diaphragm in there somewhere but what does the outer vessel surface look like - glassed in ?

 

[moondancer]

look at the french marine website. You can download brochure, spec and some drawings.

 

[snowleopard]

I was attempting to PM you when the site went down last night. Let me know which drawings you need, specifically which engine and saildrive combination you have. I imagine it is 4JH2CE or 4JH3CE with the SD31 saildrive.

The double rubber diaphragms are attached to the engine mount on the inside of the hull, then there is a non-watertight rubber gasket that spans the gap between the hole in the hull and the leg itself - there is a gap of around 1" all round. The lower gasket is just to fair in the hole and prevent turbulence. It is stuck on the outside surface with sikaflex.

The inner pair of diaphragms should be replaced every 10 years, the outer one when it splits. There is a water sensor that detects the presence of water between the two inner layers and sets off the alarm.

I can scan and email the diagrams to you.

 

[savageseadog]

I am looking for a engineering drawing or a good diagram of a Yanmar sail drive (typically fitted to a 4 cylinder diesel on a yacht 10 years ago).

Any suggestions ?

I know that there is a rubber diaphragm in there somewhere but what does the outer vessel surface look like - glassed in ?

The outer surface isn't "glassed in". It just a hole with enough clearance for the leg to move around a little, approx 10mm. A rubber cover is stuck to the hull and covers the gap.Inside there's two diaphragms which are basically rubber collars fastened to the leg and the surround

 

[snowleopard]

The hole in the hull is rather more than 10mm around the leg. It has to be big enough for the gear case to get through. The recommended size is around 4" x 9".

 

[jonno45]

I can let you have a copy of the saildrive installation manual. send me a PM and i will post it to you.