92 Nissan 18 HP stallls under load?

[kanatimcd]

Nissan motor has set up in shed for 7 years. cleaned carbs and replaced gaskets and seals. it runs fine when hooked to water hose, but when in the water under a load, it stalls when in gear. it sounds like its starving for gas, but after pulling plugs it looks like it is getting to much gas.. any suggestions what to look for?

 

[pvanv]

Re: 92 Nissan 18 HP stallls under load?

What method did you use to clean the carb?

 

[kanatimcd]

Re: 92 Nissan 18 HP stallls under load?

I took carb apart removed all plastic pieces and soaked in Berrymans carp cleaner for approx. 3 1/2 hours. Placed all jets in tray with carb. Only noticeable blockage was in the pilot jet. Could it be the pump assembly?

 

[TOHATSU GURU]

Re: 92 Nissan 18 HP stallls under load?

The fuel pump is very simple on that carburetor. The reeds in it wouldn't be an issue, but if the diaphragms were warped it could be a problem. Chances are you need to re-clean the carb again. I wouldn't spend a lot of time on it as the carb and most of the carb parts are no longer available.

 

[kanatimcd]

Re: 92 Nissan 18 HP stallls under load?

Thanks guys, gonna give it another bath just to be sure. Would it hurt to leave in longer or is 4 hour the max?

 

[pvanv]

Re: 92 Nissan 18 HP stallls under load?

In berryman's, you can probably go longer than 4 hours, as long as it isn't too warm in the shop. If you use a really aggressive dip, such as Tyme, and soak too long, you will etch the anodizing off of the castings, which will subsequently allow rapid corrosion. After the soak, use a liberal amount of spray carb cleaner to flush any loosened stuff out of any places where it might be lurking.

 

[kanatimcd]

Re: 92 Nissan 18 HP stallls under load?

Gave it another bath (5 hours). Started engine back up and ran the same. After about 20 seconds whatever was in there broke loose and engine settled in and ran fine. After a little fine tunning, it is purring like a kitten. Still a great little motor.
Thanks for all your help.