Pink Super Tech (Walmart) -50 RV and Marine ok for engine?? I always thought NO...??

[DeepCMark58A]

I will stick to my Windsor engine and single screw over an outboard. People are intimated by having to work a rudder.

 

[Cortes100]

the pink RV stuff clearly states for plastic pipes (not for engine internals). I use it to flush my RV. But have seen boat dealers use it for winterizing.

I was using this Merc -50 stuff cause it had corrosion inhibitors and never had any problems. The pic below shows what happens at -40C. It got slushy but could still shake it about. The jug never expanded. Even though it didn't go solid, after seeing that I started flushing and left the internals dry/drained.

 

[guy48065]

the pink RV stuff clearly states for plastic pipes (not for engine internals). I use it to flush my RV. But have seen boat dealers use it for winterizing.

I was using this Merc -50 stuff cause it had corrosion inhibitors and never had any problems. The pic below shows what happens at -40C. It got slushy but could still shake it about. The jug never expanded. Even though it didn't go solid, after seeing that I started flushing and left the internals dry/drained.

The color means nothing. Read the labels & use the stuff with propylene glycol & corrosion inhibitors. Not the RV drain stuff.

 

[bruceb58]

Solved the problem years ago……went to outboards

I am thinking the same when I buy my next 26' Cobalt