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Thread: TB42 Starts fine on gas, rough on petrol

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    Advanced WattsyGQ's Avatar
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    TB42 Starts fine on gas, rough on petrol

    Hey all, I've got a 1990 GQ Patrol, TB42 carby fed with petrol and gas. Just wondering if anyone would know why my engine starts and idles fine from cold when I have it on gas, and when I switch it to petrol once warm it runs fine, but if I start it from cold on petrol it won't fire properly and struggles to idle, any help appreciated!
    1990 GQ Patrol High-Roof
    Soon to be tourer!

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    Legendary 93patrol's Avatar
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    Gas dries out the seals in the carby and can block the idle jet as well.

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    WattsyGQ (13th September 2014)

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    Is there any quick way to repair this?

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    Patrol God Bob's Avatar
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    I think you will find that it is tuned more for Gas than Petrol and will run better on Gas

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    WattsyGQ (13th September 2014)

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