[RodKnock]

Originally Posted by elmariachi

A marine balancer on the engine with illegible timing marks, no timing pointer, no thermostat, loose spark plugs, loose oil dipstick tube, wrong oil pan for a low-clearance application, loose motor mount, poorly routed/unsecured gauge capillary tube lines, steering shaft binding on header, binding throttle linkage etc.

I'm not sure why your OCD-like fixation on an assembly manual would have helped in this situation (e.g., loose and missing engine parts).