Nissan NS8B with some idle problem

Cotasse

Recruit
Joined
Jun 14, 2011
Messages
4
Hi everyone,

I have done some research on the forum but unfortunately, I wasn't able to find the solution I am looking for. I have a Nissan NS8B for several years now and never had any problem at all. A wonderful equipment. Last week, we left on a boat ride and everything was perfect at the beginning of the trip. We then stopped the Nissan motor to use our electric one for fishing.

When we tried using it back, I had to use the choke more than usual and as soon as I was giving less gas, the motor wouldn't remain on the idle and would shut down every single time. We had to come back from our run (about a mile). If we give put it at 30 % or more on the neutral position no problem, but as soon as we want to put it on idle to move forward, it stops.

I checked the gas filter, seems fin. Power plugs, carb, ..everything seems fine.:confused:

Would you have any idea where it might come from?

A big thank you for your help and please excuse my english if it's not 100% accurate as i am a french individual.

Mat:)
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,579
Re: Nissan NS8B with some idle problem

Probably fuel related. Sounds as though the motor is running too lean. Verify fresh fuel and no water contamination (of course). When having running issues, try squeezing the primer bulb (to make sure you have good fuel delivery). Then have the carb disassembled and cleaned, as that is probably the issue.
 

Cotasse

Recruit
Joined
Jun 14, 2011
Messages
4
Re: Nissan NS8B with some idle problem

thanks for your reply but gas mix is brand new...

any other ideas?
 

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: Nissan NS8B with some idle problem

Your carburetor has varnish build up in one of the carb ports or jets...Just have it cleaned correctly.
 

isaksp00

Petty Officer 1st Class
Joined
Jul 14, 2010
Messages
225
Re: Nissan NS8B with some idle problem

If it is the same problem as my Honda 8HP, and you have very similar symptoms, it was the low speed jet that had some clogging. Once I cleaned it, idles fine.
 

Cotasse

Recruit
Joined
Jun 14, 2011
Messages
4
Re: Nissan NS8B with some idle problem

Cleaning the carburator with some carb cleaner worked perfectly.

Idle is perfect now.

Thanks for your help!
 
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