pocketchange
New member
"Our 3GM30 has recently develo
"Our 3GM30 has recently developed a very rough "shaking" vibration when engaging forward gear in idle to moderate rpm. Applying full throttle stops the vibration, and it is absolutely smooth in reverse at any rpm. The prop (Gori 3 blade folding)and shaft are perfect. When vibrating, the engine nearly jumps out of it's mounts, and water pours out of the Volvo packing gland. The engine isolator mounts appear tight. Am very good mechanically, any ideas?"
"Our 3GM30 has recently developed a very rough "shaking" vibration when engaging forward gear in idle to moderate rpm. Applying full throttle stops the vibration, and it is absolutely smooth in reverse at any rpm. The prop (Gori 3 blade folding)and shaft are perfect. When vibrating, the engine nearly jumps out of it's mounts, and water pours out of the Volvo packing gland. The engine isolator mounts appear tight. Am very good mechanically, any ideas?"