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Old 05-15-2019, 10:55 AM   #1
DeclanO
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Default Yamaha F115 100hr Service

Looking to do my annual 100hr service on a recently purchased boat and am planning to do my impeller as well. Does anybody have experience doing this? Watched some videos and they talked about a tool to remove the drive shaft collar. It is a 200 dollar tool I dont really want to invest in.

Is this something to bite the bullet and take to the shop or is there a proven DIY option?


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Declan

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Old 05-15-2019, 01:41 PM   #2
weld22
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Default Re: Yamaha F115 100hr Service

They are trying to sell their tools. Just did my F225 without the tool for the collar. Used a piece of lumber to get my lever angle right and went around the bottom of the collar with a screwdriver prying up a small amount at a time until it came off. Piece of cake.

Replaced it with a crescent wrench tighten to the shaft and then tap on the wrench to drive the collar back down.

About an hour job and kind of fun. I did pull the SS prop off to shed some weight. Angled my saw horses and used some scrap 1x4's underneath the cavitation plate to hold the lower unit upright.
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Old 05-15-2019, 01:43 PM   #3
DeclanO
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Default Re: Yamaha F115 100hr Service

Quote:
Originally Posted by weld22 View Post
They are trying to sell their tools. Just did my F225 without the tool for the collar. Used a piece of lumber to get my lever angle right and went around the bottom of the collar with a screwdriver prying up a small amount at a time until it came off. Piece of cake.



Replaced it with a crescent wrench tighten to the shaft and then tap on the wrench to drive the collar back down.



About an hour job and kind of fun. I did pull the SS prop off to shed some weight. Angled my saw horses and used some scrap 1x4's underneath the cavitation plate to hold the lower unit upright.
Awesome, thanks for the info. Glad to hear I shouldn't have to fork over money for the collar tool!

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Old 05-16-2019, 02:19 PM   #4
fop
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Default Re: Yamaha F115 100hr Service

I just went to change my impeller after 5 years
of using. It was still in pretty good shape. F115


I took off the lower unit and saw that collar. I was
tired and hot when I got to it and then took it
to the Yamaha shop and had them do it. That probably
could have been done by me but when it came to
that round seal it was taken out of my limited expertise.

Could just not figure out how to keep it in place when
turning it upside down.



I am not sure if of changing the impeller after
a year is necessary or not. But I do change my motor
oil every year myself with my oil changing tube.



I am not a mechanic,


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Old 05-20-2019, 11:45 AM   #5
MattPark
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Default Re: Yamaha F115 100hr Service

I buy the complete water pump kits from SIM Yamaha, and just cut the collar off if it wants to fight. The time and frustration it saves is worth every penny to me. Everything gets replaced (including base plate and woodruff key), although I wouldn't sweat it if yours are in good shape.
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