Ammonite
Well-Known Member
Can the vibration damper plate on an MD2040 fail in a way that would compromise the saildrive isolation without any associated drive issues, or would you expect odd noises, vibration etc if it was beginning to fail?
Volvo Penta MD2040 damper plate
- Thread starter Ammonite
- Start date
john_morris_uk
Well-Known Member
It can fail so there’s no drive at all. (Ask me how I know!)
Ammonite
Well-Known Member
That's what I thought. I'm trying to establish why there's continuity between the engine and the saildrive. The boat is out of the water and I've disconnected the gear selector and the cooling hose and pulled each isolating bolt in turn to check the isolating washers are OK but there's still continuity. My current thoughts are that it has to be the damper plate or contaminated oil from the crankshaft seal is potentially bridging the isolating gasket in the bell housing. The injectors were in a state before I had them refurbished and there was a lot of carbon build up in the cylinder head. I'm also guessing there's a fair amount of accumulated metal dust in that area from the starter motor gear. The resistance is around 2 ohms.
john_morris_uk
Well-Known Member
Are you absolutely sure none of the isolating washers and bushes haven’t got a bit of swarf bridging them? Is the engine in or out of the boat? If it’s out of the boat then taking the bell housing off is a really easy thing to do.
Ammonite
Well-Known Member
The engine is in the boat. I took each bolt out in turn and retested for continuity each time, apart from the two at the bottom which look like you have to remove the saildrive to gain access to. The boat is on the hard and it sounds like I'll need to seperate the engine and saildrive to see what's going on. It's a MD2040C with a 120s so it has the solid rubber vibration damper rather than the fail safe one on the 130s. I came across a couple of photos of the earlier type and it looks like it either works or it doesn't as I can't how it could it could fail to isolate the drive without any other issues
