Mercury 150 owners

[rusty1034]

SPOILER ALERT - Mystery solved !

 

 

I took the boat to a shop that services Mercs. The owner told me he suspected a faulty torque hub, possible incorrect prop.

 

Got a call a few days later saying the torque hub was fine, and he think the prop was not the issue, so he called Mercury. One thing they told him was to check the EXHAUST SLEEVE.

 

He checked the sleeve, and found that it was missing. That allowed the exhaust to escape in front of the prop, causing the “prop slippage”/ cavitation issue.

 

I took it for a test drive. Now it pops up on plane almost immediately, and tops out at about 43 mph at 5500 rpms.

 

Thanks for all the suggestions and comments.

 

In the end I think nymphO is the winner with the diagnosis of exhaust blow by.

 

Rusty

 

 

Rusty

 

[ski-dooz]

Good to hear it. That why I ask if your prop had open ports in it. I think you can still make some gains with dropping the motor a bite I can run mine at 1/2 throttle and do 40. At least you are back! It is so frustrating when they don’t run right.