Yamaha 9.9 4 stroke 2008

[twinkle12]

I have a nearly new Yamaha 9.9 long shaft as an auxiliary (large prop version). Cooling water emerges not only from the telltale (very strongly as it should) and occasionally a dribble from the relief port on top aft side of the leg (normal) but also comes out of the forward joint of the plastic coaming (secured by two screws) at the top of the leg about 18 inches above the waterline. Can anyone tell me if they have the same experience and/or is this normal please?

 

[NorthernMonkey]

Dribble from the relief port is normal, as the cooling water goes through the exhaust. However, through the Plastic coaming doesnt sound right

 

[twinkle12]

Thanks for the reply NM, my thoughts are the same but the Yamaha dealer insists it is normal "water cooling of the exhaust". In that case why isn't it inside the leg all the time? But I don't know how the exhaust cooling works on this outboard, others I've had certainly didn't do this. If there was a way of asking Yamaha Japan I would but I cannot find any email address for them.

 

[twinkle12]

Have learned from a major UK Yamaha dealer, who took one new from stock to test it, that it too "pees" water from the plastic coaming joint. On closer inspection there are two outlet holes behind the trim. So looks like Yamaha have designed the world's first incontinent outboard