15hp mariner throttle

[lilwalter]

1982 mariner w throttle problem. On land and not running throttle cable opens fine but will not close. In barrel throttle works as it should. On the water throttle works as it should 80% of the time. Other 20% throttle will not open all the way. Is this a linkage issue or are the cables shot? Would lubricating the cables help? Not a motor guy at all so thanks for any ideas.

[boatfixer]

Just to make sure of the linkage, could you post model and serial number. I assume its the japanese made mariner.

It could be adjustment and it could also be worn cables and/or linkage