This could be a dumb question!

Speedo · 26 July 2018, 16:42

I've got a 5hp Johnson 2 stroke with an internal tank but have just bought an external tank.

I'm having real problems starting it though as it seems to flood when I prime the engine,.

Should I have the switch on 'internal tank' setting (effectively 'off') when I prime the fuel line, and then switch it back to external tank before starting?

Apologies if this is a basic question but I have no manual with the old engine and only recently got the external tank!

Nos4r2 · 26 July 2018, 16:56

I'd suggest you're probably overcoming the float needle and flooding it when you prime it.

Would I be right in thinking it's an older engine?

Speedo · 26 July 2018, 17:03

Yes, it's a 2000 model, just been serviced and had a new carburettor fitted, but it feels like you can keep squeezing the primer bulb, which is why I thought maybe the internal tank switch should be shut off to prime?

Nos4r2 · 26 July 2018, 17:18

Quote:

Originally Posted by Speedo

I thought maybe the internal tank switch should be shut off to prime?

Not as old as I thought then

If you leave the internal tank 'on' you're probably filling the internal tank with the primer bulb. Turn it off and see if the bulb goes hard.