Overfilled MD2B caused oil leak

[Cadence]

Originally Posted by Scubaseas

The early MD engines were closed breather systems, no engine vent. Yeah hard to believe but apparently true. Stupid? You bet.



Another Volvo gem was the "Dynastart" or whatever it's called. It's a generator that they also used as a starter by energizing the field. Same way you can test a generator by seeing if it runs as a motor. There I just dated myself. Stupid? You bet.


Spot on for the rest of your comments.

Your stupid's are right on the money.

[Bilgediver]

Originally Posted by Don C L

This discussion may help:
https://forums.ybw.com/index.php?thr...re-md2b.23098/

My friend had the oil pressure sender fail and start leaking on his MD7a so there was no warning. We saw the temp rise a bit and fortunately we went to check and shut the engine down quickly. Did you see a rise in temperature? Check the oil pressure sender. I'm sure a mechanic will.
https://www.marinepartseurope.com/en...-21-13745.aspx

This social group may have something to help too.
https://www.cruisersforum.com/forums...o+engines.html

I also had an oil sender fail dramatically. Luckily I saw it leaking before actually starting when winding over with the handle. The sender is near the oil filter so worth checking it is not leaking. This engine operates on a low pressure so be carefull the sender you obtain if replacing it is suitable.

The poster here seems to have an elderly MD2 which had a dyno starter with a belt onto the flywheel.

[EZ Breezy]

Update here, busy week


So yeah the engine is actually and MD2 with the dynastart, my mistake.


So we had a mechanic come over and try and find the leak, we found it to be the crankscase cover, underneath the dynastart, one of the bolts connecting the dynastart has broken of, so it isn't sealed properly



The mechanic is a retired boat mechanic we found through some friends, and he's willing to fix the leak while also going over the entire motor and common maintenance with us.


thanks for the help, I'll keep you updated, and make some pictures next time

[newhaul]

Originally Posted by EZ Breezy

Update here, busy week


So yeah the engine is actually and MD2 with the dynastart, my mistake.


So we had a mechanic come over and try and find the leak, we found it to be the crankscase cover, underneath the dynastart, one of the bolts connecting the dynastart has broken of, so it isn't sealed properly



The mechanic is a retired boat mechanic we found through some friends, and he's willing to fix the leak while also going over the entire motor and common maintenance with us.


thanks for the help, I'll keep you updated, and make some pictures next time

The side inspection cover ok that makes sense extract that broken bolt and install new one and problem solved . Glad it wasn't more serious like a front seal.