Zenith stromberg 175 cd 2 manual9/25/2023 ![]() ![]() Screwing upwards weakens the mixture, downwards enriches it. Use a coin to turn the jet-adjusting screw one-eighth of a turn at a time, waiting each time for the engine speed to settle down. Make sure that the jet remains centralised. ![]() Keep the jet central while you adjust the mixture by taking the damper rod out of the top of the carburettor and pushing a pencil or soft metal rod firmly down the hole to hold the jet in place. If the jet is central, the piston falls with a sharp click. Off the engine before adjusting the mixture, and check that the ![]() If it rises and stays fast the mixture is too rich. If the mixture is correct the engine speed should rise slightly for a moment, then return again to normal. Listen to the engine note while you do so. Continuing our rebuild of the Zenith-Stromberg CD-175 carbs on our TR6, we've dedicated a video to showing you the internals of the confusing bypass valve, e. ![]()
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