Unusual behavior when flushing motor

Gpag

Cadet
Joined
Apr 24, 2019
Messages
17
Hi, I have a 2003 Yamaha SX200TXRB that is used almost exclusively in salt water. The motor is running great but I noticed something odd while flushing it after a trip and I don’t know if it is a problem or not.

When I come back from a trip I flush my motor with fresh water via the flush connection. This year I started flushing it with Salt Off. I hook up the hose and Salt Off flush dispenser to the flush port, start running water only and start the motor. Once the motor is warmed up I start running the Salt Off through it.
In the video you can see that once I start the Salt Off I see bubbles coming from under the steering arm yoke in front of the upper case assembly. If I shut the Salt Off and switch to just water the bubbles stop and I don’t see water coming from that area; start the Salt Off and I see bubbles again. I have never seen any water coming from there when flushing with plain water. If there was a problem, I don’t understand why I would see air (bubbles) but not a water leak.
As I said, the engine runs great, no overheating problems and the gear oil is good. I did recently change the prop shaft seals because they were allowing water in; no problem since I changed them.
Anyone have any ideas on whether I should be concerned about this? Is there anything I should monitor
Thanks.
 

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robert graham

Admiral
Joined
Apr 16, 2009
Messages
6,908
My guess is the Salt Off is a type of acid and dissolving the calcium/salt causing the foam…looks to be working well….
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,097
that or there is an air leak in the system that only allows air in when the salt off is being sucked in somehow.
But I would like to think Robert's replay was correct
 
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