6 replies to this topic

[Moonman]

I've my engine built but when I try to start it up it just turns, there is a spark but there doesn't seem to be petrol entering the cylinder, I have twin su carbs and there is petrol being pumped into them but that seems to be as far as it gets, would anyone have a clue what the problem is? Thanks

[coopdog]

Timing is 180* out?

Maybe you've put the dizzy drive in upside down, just rotate the leads for now and if it works you know it's that!!

Also you might have a block in the carb, any fuel in the float bowl?

Edited by coopdog, 09 June 2014 - 09:46 AM.

[Moonman]

I haven't removed the dizzy so I don't think that's the problem there was a wee bit but not much I think a blockage could be the problem

[KernowCooper]

Pour a little amount of fuel into the intakes to test if its fuel related, if it starts then inspect the needle valves and see if they are blocked.

[Moonman]

Well got home and put some petrol in the intake and it started up and ran for as long as I held the throttle open so I'm guessing it just needs the carbs fully set up an I should hopefully be fine

Edited by Moonman, 09 June 2014 - 06:46 PM.

[KernowCooper]

Strip and find out why there is no fuel to the engine from the float bowls, needle valves or blocked jet tubes, check the pumps proving fuel ok in a jampot cranking over

[Moonman]

Good news cleaned every inch of the carbs and and the float bowls had some grit in the bottom of them so starting no bother now