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The other fault with this machine is a loud, metalic scraping/whirring noise when the engine is running. This noise reduces significantly when the blade clutch is engaged to spin the rotor, so I'm wondering if the noise is coming from the clutch assembly when it is in neutral? I tried running...

Thank you very much @StarTech. Having the part number and also the lawnmower model designation is a big step forward! Couldn't ask for more. The cable does work, just not very well. Stops short of the 'choke' position on the control lever (even though the choke is activated) and the engine...

Thank you very much. Yes, those pictures match what I have seen when I search for the throttle plate asembly on Ebay (UK) etc. Mine looks different, but mine does match what I have seen in the user manual from Honda (see pic), even though no one else seems to use what I see in my manual...

Thank you for your reply @StarTech. I hadn't considered wrong cable. I was thinking more of a missing part on the throttle plate assembly. But wrong cable is more likely. My model is the one with 'Roto-Stop' blade clutch feature and self-propelled, SXE model, I think. I'll put more pics below...

Hi All, Newbie poster here. In Scotland (UK) so I may be in the wrong place. I've just bought this vintage Honda HRB 423 self-propelled lawnmower. The speed control isn't working as it should, and the engine kill doesn't work properly (fails to kill the engine in the 'STOP' position). The way...