This is a Volvo Penta KAMD 300 Marine Diesel engine. The engine has a new turbo, valve adjustments, compression check and serviced. There is an injection pump issue. Engine runs well to 2800 and when the super charger shuts down the boost is low causing the cycling. We feel a fuel pump issue. The timing changes once underway. We have the jackshaft and controls. Please contact us with any questions!