1997 Yamaha 200hp 2 stroke

[Zanny]

I have a 200hp yammie, counter rotation with 330hrs
I went out in the boat the 1st day it run fine. Went out the next day, and heard a clunking sound so I pull back the throttle and check the engine and look at the lower unit to see if I pick up anything and I didn't. Start back up, shift it in forward and moves fine in idle, gave it some throttle and it start jerking and clunking. It run at idle for 6 miles to the marina.
I just replace the lower unit because the same thing happened with the old 1.
I need some help, I am thinking 2 lower units can't do the same thing.
It takes forward only at idle speed but reverse I can get more speed without any problems.
HELP.

 

[robert graham]

Clutch dogs/shifting out of adjustment and not engaging completely?…Maybe drop the lower unit and check for shifting….

 

[QBhoy]

How’s the shift cable and assembly at the engine ? I’d have a look at that with the engine cover off whilst it’s doing it. To see what’s happening there. See if it’s jumping out of gear.

 

[Zanny]

I have, with the cover off, manually shift it in gear and held it there while some one run the boat and it still did the same thing.
I have check the oil for water and change the oil.
I am about to drop the lower unit and see if I gear shifter has not advance to far or not enough

 

[robert graham]

With lower unit off, turn prop shaft by hand and manipulate shift lever on top of lower unit until neutral is found….then re-assemble lower unit onto motor…this may fix your problem.