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I already make a post for the trouble but with too much issue and kinda hard to diagnostic. I will be short this time. The engine only ran at idle, if you touch the throttle it bogs really bad. You can't get the rpm up. BWAAAaa. New gas in tank, new lines (all) and filter, fuel pump ran great last year, carb cleaned and well sync, new engine, when it run at idle and pull the plug cap off and on the rpm drop is the same for the 3 cylinder...Anny tips?
 

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what's the compression on each cylinder?

are you sure each cylinder is getting fuel and spark?

it's possible that one of the slides isn't moving, double-check the throttle cables.

assuming that the engine/carbs are ok, check the clutching and motor mounts.

a loose belt, broken spring, and/or a broken motor moumnt
can cause a bog.
 
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