2000 yamaha 50 outboard

[jetcraft]

We were running at 28 mph when I knocking started instantly. It only has the knock when its in gear and over 8 mph. I can run it in neutral at full RPM and it has no knock. boat shop is saying they think it is a rod but in my experience with motors a rod will knock as soon as the motor runs and it is always moving and it won't knock unless its in gear. Any ideas what it could be???

 

[Jerryjerry05]

Check the lower unit for metal shavings or chunks.
Does it do it in R ?
Sounds like the clutch dog might be bad??????
Take the lower unit apart and check the dog for wear.
Post some pics.

 

[boscoe]

Keep operating it at full power in neutral and you won't have to worry about it.

 

[jetcraft]

Thanks Jerry! going to get it now and will check that right away. if that's all good ill post the video I took of it when it happened.