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2.5 petrol

  1. Grogu

    2.5 petrol not running properly

    Hello good people of the internet. I'm experiencing some issues with my 2.5 petrol engine. Any have ideas what could be up? It starts perfectly when cold and runs fine until it warms up, then it starts to misfire and dies. Does this on both gas and petrol. I have rebuilt the carb but no...
  2. culp

    Water and Oil Mixing

    I've just replaced the head gasket on my 2.5 Petrol 110 as oil and water were mixing giving the yellow "mayonnaise" deposit inside the rocker shaft. It still seems to be happening and the mayo is back. Could the water be getting into the oil anywhere else? I damaged the new gasket...
  3. Adler

    Jet sizes for a Zenith / 2.5 petrol

    Any experience out there as regards best jet sizes for a 2.5 conversion? I have installed a 1989 2.5 LR petrol engine with the manifold and Zenith carb from the 2.25, plus a sports exhaust. Current jets are as per the 2.25 set-up. Apart from dizzy issues (separate thread running) she's running...
  4. Adler

    Ignition and carb advice for a 2.5 petrol

    I have a 1989 2.5 petrol engine in my '72 88", with a Zenith carb and manifold from the old 2.25 petrol, plus a sports exhaust and manifold. The carb has the same jets as when running the 2.25. Problems and questions are as follows: Q1. Contact breaker gap keeps closing - sometimes after 1km...
  5. Adler

    2.5 petrol fuel starvation

    Hi, My SIII has a 2.5 petrol engine from a 1989 Defender. I used the manual fuel pump and carb from the old 2.25 and banged on a stainless sports exhaust and manifold. She's been running great until last night when she suddenly spluttered and died when at full throttle. A quick check showed...
  6. Adler

    Temperature gauge

    Hi, I've just put a rebuilt (1987) 2.5 petrol engine into my (1973) 88", complete with sports exhaust and K&N filter. The new engine is a big improvement over its 2.25 3 bearing predecessor. The one issue I have is that the temperature gauge barely moves, even when the engine is hot. Any advice...
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