Suzuki DF70 engine oil leaking down water intake tube

[SEAPRO170DC99]

I've got an issue that has stumped a few suzuki dealers. Thought I would try my luck here. I have a Suzuki DF70 1999 4-stroke outboard that is leaking engine oil down the water inlet tube and out the water intake on the lower unit. Any ideas would be great. The drive shaft and water impeller housing have already been replaces with no luck. The leaking seemed to stop after having the drive shaft replaced but only after about 2-3 hours of running the leak began again. The engine has about 300 hours and about 30% of them in saltwater...

Thanks in advance for any help.

 

[Shiprat]

Re: Suzuki DF70 engine oil leaking down water intake tube

I've got an issue that has stumped a few suzuki dealers. Thought I would try my luck here. I have a Suzuki DF70 1999 4-stroke outboard that is leaking engine oil down the water inlet tube and out the water intake on the lower unit. Any ideas would be great. The drive shaft and water impeller housing have already been replaces with no luck. The leaking seemed to stop after having the drive shaft replaced but only after about 2-3 hours of running the leak began again. The engine has about 300 hours and about 30% of them in saltwater...

Thanks in advance for any help.

Did you ever figure out this issue? We're haveing the same problem and our mechanic said he's never heard of engine oil leaking from the water intake on the lower unit? Thanks for any info you may have on this issue.

 

[clanton]

Re: Suzuki DF70 engine oil leaking down water intake tube

I would pressure test the block oiling system and cooling system. Oil pan on, oil pan off.

No water in oil, must be pushing oil from oiling system, system oil pressure 60/70 lbs. water pressue about 12 psi.

There is also a dye you put in the oil to find oil leaks, using a black light. Automotive product.

 

[JB]

Re: Suzuki DF70 engine oil leaking down water intake tube

This is an old, dead thread, Shiprat. You must have missed this:

Announcement:
-------------Please DO NOT reply to old threads or hijack existing threads. Old threads of a technical nature are like a library book, Do Not write in them.

Don S ‎(Moderator)
May 26th, 2011

Please start your own thread.