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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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I have a 1959 10 hp outboard it has the two line system. I

Customer Question

I have a 1959 10 hp johnson outboard it has the two line system. I can get it to start but it won't stay running it's got the pressurised tank system and I'm not sure I have it hooked up right
Submitted: 1 year ago.
Category: Boat
Expert:  Jeff G. replied 1 year ago.

How long does it run?

Once started, if you loosen the fuel cap, you should get a vacuum or whoosh sound. If not then the system isn't pressurizing.

The system uses crankcase pressure to pressurize the tank. This forces the fuel to the carb. Any leak in the system, at the tank, fuel connector etc will cause fuel to not transfer.

Let me know how long it runs and your results from running it.