Nissan 8hp Exhaust

[1985bluefin]

Hey guys I just picked up an 8 hp Nissan and took it out on the lake to get some freshwater running through it(it was used primarily on a sailboat). I noticed that not all of the exhaust isn't coming out by the prop, some is coming out by the powerhead. What does this mean? Could it just be plugged up a little? Or is this a major fix kinda deal? Thanks for any input you guys might have.

 

[pvanv]

Re: Nissan 8hp Exhaust

What is your model/serial?

If the exhaust is exiting from above the waterline, on the back of the leg, through a small hole or two, you are probably seeing the exhaust relief at work. That's normal. If it is leaking inside the cowling, you likely need a new base gasket.

 

[1985bluefin]

Re: Nissan 8hp Exhaust

Model- NS8B
Serial- 78931

It's leaking inside the cowling for the most part. It wasn't running up to par and when I took the cowling off there was a bunch of exhaust inside. Once I took it off and ran it with the cowling off letting it get some fresh air, it picked back up and ran fine.

 

[Sea Rider]

Re: Nissan 8hp Exhaust

Before changing base gasket, retorque under shaft housing bolts, maybe a bit loose, if not, change base gasket, seal gasket both sides properly with heat resistant silicone, mega gray type.

Happy Boating