50hp johnson throttle up slamming

[SACCO60]

Help i have a 1998 50hp johnson outboard. when i try to throttle up there is a banging sound in the engine then the boat slams into gear. Ones the engine gets up in speed there is no more sounds and it runs fine. I put it into reverse there is no slamming from it any idea's.

 

[flyingscott]

Something is out of adjustment either the cables or shift rod height or check the lower unit lube. From what you describe the motor is revving before it shifts.

 

[oldboat1]

I wonder if it's an issue with the remote box (or perhaps the shift cable at the box). A standard test is to disconnect cables at the engine, and operate from the linkages at the engine.