Screwing upwards weakens the mixture, downwards enriches it. All of the Zenith Stromberg carbs designations begin with a number to. 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. The designating letters are 2 for 1.25in, 4 for 1.5in, 38 (HIF metric) for 1.5in. 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. I cant remember the exact figures but approx 973 ish were built with 53 ish, right hand drive and staying in the UK. 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. Carburetor Service Kit - Zenith Stromberg - 175CD - Manual Choke Sale Price:42.25 Gasket - Stromberg Carb to Manifold 1.75' Sale Price:0.76 Clip, Cable Sale Price:1.26. Read the instructions and study the exploded view of the carburetor. If the mixture is correct the engine speed should rise slightly for a moment, then return again to normal. Stromberg Cd 175 Carburetor Stromberg 175 Cd 2 Manual Zenith-Stromberg 175 CD2 SE units were used on 1970 140 series models, and on. Listen to the engine note while you do so.

Zenith stromberg 175 cd 2 manual