halsteadmorris
Seaman Apprentice
- Joined
- Mar 10, 2021
- Messages
- 33
Hello, all. To start off let me just say that I am not a boat guy. I've wrenched cars for years and am looking to BECOME a boat guy. Assume I'm an idiot and use small words 
I recently bought a 2 stroke 18hp Evinrude motor. 1954. It has fuel issues and needs to be primed constantly to stay running. I'm using 24:1 fuel/oil ratio. I got it up on a barrel and was starting it and idling it when I noticed a frothy substance on the surface of the barrel, along with a rainbow sheen and a bit of moss... Drained the barrel, ran it again. It seemed to get worse. I immediately thought really bad gear oil leak and drained it to check. Pitch black but no milkyness. While it was out of the barrel I noticed a black/gray sludgy substance dripping out of the prop exhaust and two holes on the side of the motor.
Bit of background: motor was probably on its side for at least a few days after being run in a barrel by the guy I purchased from and on the 2 hour drive back to my home. I ran it in a barrel yesterday - pretty briefly - and I did not notice this extreme of an issue, although the water was cloudy and there was a bit of an oily shine to it. This motor does blow a lot of blue smoke.
The substance smells like a gasoline, and I've been hearing that unburned gas could be the cause of it - I'm hoping for it. That would make sense to me due to the fuel issue. My fear is that I have a bad lower seal and the whole thing is soaked. In my gut I feel that it just needs to run for a bit to shake off many months of sitting... but I would really appreciate more knowledgable people to give their input the issue before I go idle a potentially problematic engine for 30 mins plus.
Pictures of the milky substance and leak locations are attached. This was after starting 3-5 times and running for a max total of 4-5 minutes.
Thank you
I recently bought a 2 stroke 18hp Evinrude motor. 1954. It has fuel issues and needs to be primed constantly to stay running. I'm using 24:1 fuel/oil ratio. I got it up on a barrel and was starting it and idling it when I noticed a frothy substance on the surface of the barrel, along with a rainbow sheen and a bit of moss... Drained the barrel, ran it again. It seemed to get worse. I immediately thought really bad gear oil leak and drained it to check. Pitch black but no milkyness. While it was out of the barrel I noticed a black/gray sludgy substance dripping out of the prop exhaust and two holes on the side of the motor.
Bit of background: motor was probably on its side for at least a few days after being run in a barrel by the guy I purchased from and on the 2 hour drive back to my home. I ran it in a barrel yesterday - pretty briefly - and I did not notice this extreme of an issue, although the water was cloudy and there was a bit of an oily shine to it. This motor does blow a lot of blue smoke.
The substance smells like a gasoline, and I've been hearing that unburned gas could be the cause of it - I'm hoping for it. That would make sense to me due to the fuel issue. My fear is that I have a bad lower seal and the whole thing is soaked. In my gut I feel that it just needs to run for a bit to shake off many months of sitting... but I would really appreciate more knowledgable people to give their input the issue before I go idle a potentially problematic engine for 30 mins plus.
Pictures of the milky substance and leak locations are attached. This was after starting 3-5 times and running for a max total of 4-5 minutes.
Thank you