I need your help! Go to the end of this forum to read my issue. Thanks

Hey guy’s. I boat my first boat of my life this past year. It’s a 30 year old bass boat in great shape. It has a 200 mariner 2 stroke on it that has been well maintained. I am mechanically inclined when it comes to cars but when I took the cowl off for the first time I thought I was in Frankenstein’s laboratory. Wires going everywhere and stuff I never seen before. Anyway, I’m impressed with your thought process and knowledge of these out board motors. I know now that Mariner is basically a Mercury. I had to bring it to the shop twice so far and am learning the labor part of repair’s is very expensive. Reading your post I think I might have an over oiling problem because I do a lot of idling around when crabbing and fishing. I’m getting ready to change the plugs and hope my problem goes away. The problem I’m having is when I go to mash it to get up on plane sometimes the motor starts shaking and bogging And the rpm’s won’t go up. It will idle fine and cruise around at low speeds but won’t get up on plane. It’s not consistently doing it either. Sometimes I can step on it and it gets right up on plane and runs great. Once it’s up on plane I have no problem’s at all. The stator has been replaced and all 3 carbs have been cleaned along with the primer bulb and main fuel line. I’m hoping it’s the plugs because it calls for the surface gap plugs which I am putting in but if they foul easy at extensive idling how can I avoid future problems. Any advice would be greatly appreciated.