Hello i recently bought this 45 but when i start my engine it smokes black so today i pulled out the sparkplugs and they are black and dirty and were wet also. I did a compression test and all cylinders were between 152 and 160 psi. I ordered new sparkplugs but think the carb is overfuelling. Since i'm more a diesel kind of guy and most landcruisers here are diesels i don't really know how to set up the carb or is there something i can check? Anyone got tips?