Fuel **** Problems on a Tohatsu 4hp 4 Stroke Engine

floresjl

Recruit
Joined
Oct 24, 2015
Messages
1
This seems strange but if my outboard has been sitting for a while and I add fuel to the internal tank and try to start it, it won't start. I have the fuel **** in the right position and checked to see if the carb has fuel by unscrewing the drain screw. Now if I connect the external tank and switch the fuel **** the engine will start. once the engine starts, I can switch the fuel **** to the internal fuel tank and the engine continues to run. To complicate things more. The reverse has also happened. If the external tank doesn't start the engine after several tries, all I do is to switch the fuel **** to the internal tank and the engine will start. Again once the engine starts I can switch over the the external tank. This issue just started about 6 months ago. Once the enegine is warm I can go back and forth to either tank and have no issues. FYI.... I remove the external tank and let the engine die when storing it. at the same time I also remove the internal tank and drain all the gas from it as well. Thanks for your help in advance.
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,559
You may have some debris in the fuel line, that gets pushed around depending on the fuel flow. You could also have sticky valves in the fuel filter. Having some gas in the bowl doesn't mean it's filled to the correct level, so disassemble and inspect/clean the entire fuel system.
 
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