I just bought a 98 Seaark ZX200 with a 98 Johnson 150 model number J150ELECD. I test drove the boat and it seems to run fine. It started easily, idled smooth, and wide open pushed the boat to 51 mph. I am new to big motors and I am wanting to make sure the motor is sound and serviced. The local shop is book for weeks so I would like to do it myself. They suggested a compression test, new plugs, VRO removal, lower unit oil change, and a new water pump. I think I can handle all of that but I don't know much about the VRO system. I have searched on this board and I don't find much about them. I have read they have problems but I am not sure if I should disconnect it or not. Any suggestions on the VRO system? Any suggestions would be greatly appreciated.