Did I cause damage?

[Tacoman1985]

Hey everyone, new to the forum here and I’m hoping you well educated people can help me out with my 1973 evinrude fasttwin 18 (18304).

I was out last weekend on a new river, putting along at about half throttle because we didn’t know the waterway. When we turned around to head back up river I opened the throttle up and there was no increase in speed or rpm. I was about 5 mins from the launch so we just plugged along. Once I got home I popped the cowling off and found the connecting rod for the secondary butterfly had come undone, not allowing the butterfly to open. The plugs came out pretty wet and I also noticed a decent amount of 50:1 around the propeller/lower unit (not enough to require a drip pan, just a few wipes with a rag) So I guess I had been running WOT dumping a bunch of fuel into the carb/engine all while having restricted air flow. I re attached the connecting rod and ran the engine in a bucket and it ran right up to peak RPM.

Is there anything more I should do? Anything else I should check? Is it possible this has caused damage I can’t not see or have yet to find? Pic of of the leak attached.

 

[greggilo]

You should be fine. Cylinders were still being lubricated.

 

[racerone]

Do not run at full throttle in a bucket.

 

[Crosbyman]

looks like just carbon wash out from flooding fuel coming out the cavity drain hole.

if it works don't fix anything

 

[Tacoman1985]

Do not run at full throttle in a bucket.

Thank you for the reply and advice. It wasn’t for more then a split second just to see if it would rev up.

 

[Tacoman1985]

looks like just carbon wash out from flooding fuel coming out the cavity drain hole.

if it works don't fix anything

Thank you very much for the reply!

 

[Tacoman1985]

You should be fine. Cylinders were still being lubricated.

Thanks so much, They were for sure still being lubricated, those plugs came out really wet.