IMPELLER TORQUE SPEC

[RobbieO]

Since service manuals are not available for the 2021's yet, I looked at the service manual for a 2019 195S and it says 243 ft. lb. Sound right anyone?
Thank you.

 

[FSH 210 Sport]

No!

On my boat it is around 50lbft of torque.

 

[RobbieO]

No!

On my boat it is around 50lbft of torque.

What year is your boat? Twin engine? And where did you get that spec? I couldn’t break them loose, had to take them to a shop. If they were 50 ft. Lb. , I could break them loose.

 

[FSH 210 Sport]

What year is your boat? Twin engine? And where did you get that spec? I couldn’t break them loose, had to take them to a shop. If they were 50 ft. Lb. , I could break them loose.

2020 FSH 210 Sport, twin TR-1 engines.

Got the torque spec out of the service manual I bought from Yamaha.

The number you stated, 243ftlb is A LOT of torque. The only thing I’ve ever tightened remotely that tight were the wheel bearing lock nut on a Dana 60 front end.. I think that was only 180ftlb.

 

[RobbieO]

2020 FSH 210 Sport, twin TR-1 engines.

Got the torque spec out of the service manual I bought from Yamaha.

The number you stated, 243ftlb is A LOT of torque. The only thing I’ve ever tightened remotely that tight were the wheel bearing lock nut on a Dana 60 front end.. I think that was only 180ftlb.

I agree....The threads are long, and very fine pitch. The shop had a hard time busting them loose. I've got another day to figure it out. Thank you!

 

[Ozark]

https://jetboaters.net/threads/yamaha-195s-service-manual.33117/

 

[Ozark]

And here’s where you can buy a hard copy for a 2021

YAMAHA MANUAL STORE

www.yamahapubs.com

 

[RobbieO]

https://jetboaters.net/threads/yamaha-195s-service-manual.33117/

Yes, I’m using the spec from the service manual I previously downloaded from you

 

[RobbieO]

And here’s where you can buy a hard copy for a 2021

YAMAHA MANUAL STORE

www.yamahapubs.com

Only owners manuals are available at this time. I check weekly

 

[RobbieO]

I agree....The threads are long, and very fine pitch. The shop had a hard time busting them loose. I've got another day to figure it out. Thank you!

I torqued them down until the factory marks lined up and called it good. Probably around 100 ft lb

 

[Ozark]

Only owners manuals are available at this time. I check weekly

Does it tell you that after you try to check out? This is where I bought mine, and I just now added one to the cart and they appear available.

 

[Ozark]

Yes, I’m using the spec from the service manual I previously downloaded from you

I can’t take the credit for that. @NSpradley put in the work to convert it all. I just wish I would have seen his post before I bought the hard copy!

 

[RobbieO]

Does it tell you that after you try to check out? This is where I bought mine, and I just now added one to the cart and they appear available.

Going to recheck right now. Thank you!

 

[RobbieO]

Does it tell you that after you try to check out? This is where I bought mine, and I just now added one to the cart and they appear available.

Still shows SERVICE manual N/A for 2021 212SE

 

[Ozark]

Still shows SERVICE manual N/A for 2021 212SE

Ah, thought you had a 195S!

 

[FSH 210 Sport]

Well, I’m surprised at that high torque level on the impeller! I would have never thought it would be that high.

 

[mrcleanr6]

The torque is very high on the impellers. They are reverse thread so the engine torque will tighten them if you dont. The problem is if you dont tighten them enough then when you nail the throttle, the engine will spin the prop up and will be way over torque and you may never get the prop off. Your better off overtightening than under tightening and allowing the motor to do it. Typically for me to break free the impeller on my ski i am using a 6’ cheater pipe and i am jumping on the end of it. Sometimes i feel like i will break the shaft but that has yet to happen.

 

[NSpradley]

I can’t take the credit for that. @NSpradley put in the work to convert it all. I just wish I would have seen his post before I bought the hard copy!

i actually bought a hard copy then lost it. Yamaha refused to even give me a discount on another one so I bought access to the ebook to decipher the url of all the page images and saved them all and converted it to PDFs. That’ll show em!

 

[RobbieO]

The torque is very high on the impellers. They are reverse thread so the engine torque will tighten them if you dont. The problem is if you dont tighten them enough then when you nail the throttle, the engine will spin the prop up and will be way over torque and you may never get the prop off. Your better off overtightening by hand than under tightening and allowing the motor to do it. Typically for me to break free the impeller on my ski i am using a 6’ cheater pipe and i am jumping on the end of it. Sometimes i feel like i will break the shaft but that has yet to happen.

I used my my 1 1/16" torque adaptor with a 24" 1/2" drive torque wrench. I wasn't able to get the 243 ft. lb., because the shaft started to twist. However, I feel confident they are tight enough because the factory torque markers line up. I used a 1 1/16" long combo wrench on the spline tool and laid it flat on the ground. I had my wife stand on the wrench while I torqued the impeller. Worked great considering I don't have a very big bench vise. I feel confident they will not back off during deceleration. Some videos on Youtube show guys basically just tightening them by hand. That's risky.

 

[mrcleanr6]

Doesnt sound like the bearings were pressed all the way until they bottomed out. There has to be zero resistance to turn the shaft. It should spin freely.