Tohatsu 9.8 won't stay running

JET4

Cadet
Joined
Mar 7, 2010
Messages
23
I have a 2010 Tohatsu MFS9.8A3EPTS outboard. When I lift the neutral warm up lever the motor will fire up and run. When I lower the netural warm up lever it cuts right off.I let it warm up for 10 minutes and it still cuts off when you lower the lever.
 

pvanv

Admiral
Joined
Apr 20, 2008
Messages
6,509
Re: Tohatsu 9.8 won't stay running

You likely have either one or both of the following:
1. Incorrectly adjusted idle stop screw.
2. Junk in the low-speed carb circuit.

Are you running a water-separating filter in the fuel line? If so, that should capture any reasonable amount of junk or water that may have been introduced via the fuel tank in so short a period of time.

Has the motor been run, then left shut down for a few weeks without emptying the carb? If so, low-quality fuel may have started to varnish up the low-speed carb circuit.

Since any EP motor requires dealer installation, and you have a 3-year warranty, ask your installing dealer to look at the problem. Of course, if the issue is bad fuel (and junk in the carb passages as a result), that is generally considered abuse -- or at least beyond the control of Tohatsu, and likely will not be covered by warranty.
 

JET4

Cadet
Joined
Mar 7, 2010
Messages
23
Re: Tohatsu 9.8 won't stay running

Yes I'm running a Tohatsu water/fuel separating filter.I will check the idle stop screw, Thanks
 
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