Nissan 5HP NS5B

[Giorgio]

My Nissan outboard doesn't show water coming out of the column, but I see that it sends bubbles down the cavitation plate.<br /><br />Will the motor overheat, is there a way to clean the water passage, or what could be wrong?

 

[buckeye_sean]

Re: Nissan 5HP NS5B

Giorgio, you should have water coming from the exhaust port on the back of the motor shaft and the tell-tale squirter on the side of the shaft. If you aren't getting any water, you will overheat your motor and risk serious damage.<br /><br />First check for any blockage in the tell-tale hole - a wire coat hanger or similar item works well for this. If you find nothing there, chances are it is your impeller or a stuck thermostat. The impeller is relatively easy to replace and you can order a replacement kit for around $50 for most smaller engines. I personally have never messed with a thermostat, but from what I have heard it isn't a terrible job either.<br /><br />Get a manual and start reading so you can take care of your motor. Otherwise there are many dealers and repairmen out there that will help...at a fee.

 

[Giorgio]

Re: Nissan 5HP NS5B

Thank you buckeye for the insight, I will check for blockage as you said.<br /><br />Is there a firm that sells impellers for Nissan on the net that you know of?

 

[Giorgio]

Re: Nissan 5HP NS5B

Would the motor have to be warm before the thermostat allows water to flow for cooling? or water should start flowing right away?

 

[buckeye_sean]

Re: Nissan 5HP NS5B

Sorry didn't reply sooner. Try Avalon Professional Group www.internetoutboards.com as I understand it, they are the main parts distributor here in the USA. (They also sell parts on ebay.)<br /><br />I believe you should be getting water from the smaller tell-tale hole no matter what. Really check for blockage like insect nests etc... If your motor has been sitting a while that could be your problem - or the impeller has dry-rotted - or the thermostat has stuck shut.<br /><br />Again, I would get a manual and remove the lower unit to first check the impeller. (I just did it for the 1st time myself and it was easy.) Beyond that, if it is the thermostat you'll definately need the manual for reference. You can find them here on iboats or check ebay or a local Nissan affiliated marina.<br /><br />Good luck

 

[sailorbob]

Re: Nissan 5HP NS5B

You may also try www.onlineoutboards.com or www.tohatsuoutboards.com. I have bought from those guys and they have good prices and their staff is good especially with the older Tohatsu's. I was referred to them by Tohatsu who spoke very highly of them.

 

[TOHATSU GURU]

Re: Nissan 5HP NS5B

No thermostat on that model engine. The water tell-tale has a very small diameter on that model and you can try compressed air to free it up. Any Nissan, Tohatsu or Mercury dealer has the parts for this particular engine.