Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-05-2020, 00:51   #1
UFO
Registered User
 
UFO's Avatar

Join Date: Oct 2017
Location: Somewhere on the Ocean
Boat: Lagoon 440
Posts: 1,430
Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

2016 Yamaha Enduro 2 Stroke 15HP



The lower unit seems to be being held on by something - The Manual (not for this model) and Videos just show it dropping off easily, but mine will not come off.


I have removed the 4 bolts as well as the gear shift rod (see Pictures)


What else am I missing?
Attached Thumbnails
Click image for larger version

Name:	1.jpg
Views:	152
Size:	367.4 KB
ID:	214674   Click image for larger version

Name:	2.jpg
Views:	213
Size:	315.8 KB
ID:	214675  

UFO is offline   Reply With Quote
Old 09-05-2020, 02:33   #2
Registered User

Join Date: Nov 2019
Posts: 1,642
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Quote:
Originally Posted by UFO View Post
2016 Yamaha Enduro 2 Stroke 15HP



The lower unit seems to be being held on by something - The Manual (not for this model) and Videos just show it dropping off easily, but mine will not come off.


I have removed the 4 bolts as well as the gear shift rod (see Pictures)




What else am I missing?
Hmmm

You have the shift linkage removed

Hmmm

It should just slide apart

Hmmm

Only the splined driveshaft and push to fit water pump connection are left

Hmmm

Double check the part diagram to be sure that nothing else is left

Hmmm
slug is offline   Reply With Quote
Old 09-05-2020, 02:40   #3
Registered User
 
Chotu's Avatar

Join Date: Jan 2018
Boat: 50ft Custom Fast Catamaran
Posts: 11,832
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Silly question.

Did you try rotating the prop back and forth a little bit by hand while attempting the pull the lower unit off?

Do you have a clearer pic showing what’s between the two parts? I can see the impeller housing. But can’t see what else is between the two.
Chotu is offline   Reply With Quote
Old 09-05-2020, 04:22   #4
UFO
Registered User
 
UFO's Avatar

Join Date: Oct 2017
Location: Somewhere on the Ocean
Boat: Lagoon 440
Posts: 1,430
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Quote:
Originally Posted by Chotu View Post
Silly question.

Did you try rotating the prop back and forth a little bit by hand while attempting the pull the lower unit off?

Do you have a clearer pic showing what’s between the two parts? I can see the impeller housing. But can’t see what else is between the two.

Did not try the prop rotation - Will try tomorrow and get a better picture as well
UFO is offline   Reply With Quote
Old 09-05-2020, 04:23   #5
UFO
Registered User
 
UFO's Avatar

Join Date: Oct 2017
Location: Somewhere on the Ocean
Boat: Lagoon 440
Posts: 1,430
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Quote:
Originally Posted by slug View Post
Hmmm

You have the shift linkage removed

Hmmm

It should just slide apart

Hmmm

Only the splined driveshaft and push to fit water pump connection are left

Hmmm

Double check the part diagram to be sure that nothing else is left

Hmmm

Unfortunately I do not have the exact manual for this model/year - Just a Generic downloaded Yammy 15HP Manual
UFO is offline   Reply With Quote
Old 09-05-2020, 06:22   #6
Moderator Emeritus
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Try calling a dealer that sells two strokes, I don’t have any idea either. About all it could be is the drive shaft, but as it’s already moved an inch I don’t think it’s seized
a64pilot is offline   Reply With Quote
Old 09-05-2020, 06:56   #7
Registered User
 
Sailmonkey's Avatar

Join Date: Sep 2009
Location: Houston
Boat: ‘01 Catana 401
Posts: 9,626
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

I just dropped the lower unit on an old 50hp evinrude 2 stroke.

It did almost exactly the same thing, drove me bonkers until I realized there was an o-ring on the splines of the drive shaft. The years had made this thing hard. I shove the lower unit back up and dropped it several times with prejudice until the o-ring tore enough for the unit to drop.

Not saying you’ve got the same thing, but it’s possible.
Sailmonkey is offline   Reply With Quote
Old 09-05-2020, 08:12   #8
Registered User
 
Richard Harper's Avatar

Join Date: Sep 2009
Location: Florida
Boat: Seawind 1000 XL
Posts: 70
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

On my Mercury I have to remove the nut from the lower half of the shift linkage
Richard Harper is offline   Reply With Quote
Old 09-05-2020, 08:55   #9
Registered User

Join Date: Mar 2019
Posts: 49
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Might try turning motor upside down and and applying liquid wrench or PB Blaster to slide down the drive shaft into the spline area. That might have some corrosion. Let it sit upside down reapplying judicious Blaster overnight. With a block of wood and hammer gently alternately tap the lower unit with the motor in the upright position, clamped to a fixed position so the lower unit is clear of the floor.
Ranger2727 is offline   Reply With Quote
Old 09-05-2020, 09:08   #10
Registered User
 
Scubaseas's Avatar

Join Date: Apr 2005
Location: Seabroook Texas or Southern Maine
Boat: Pearson 323, Tayana V42CC
Posts: 1,501
Images: 1
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Water tube may be holding it. Try spraying lube of some kind (WD40. PB Blaster etc.) on top of water pump housing. Move up and down with authority then try slight twist and pull downward to see if it comes apart. Don't think there is an o-ring on top of the drive shaft on that year.
Scubaseas is offline   Reply With Quote
Old 09-05-2020, 09:46   #11
Registered User

Join Date: Dec 2013
Location: Salt Lake City
Boat: Gulfstar 50
Posts: 48
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

You have all the necessary fasteners removed and all need items disconnected. You have got some corrosion on the Driveshaft splines where they go into the crankshaft. See if you can, turn the motor upside-down and spray WD40 on the driveshaft, through the small gap between the cases. Use liberal amounts, wait 24 hours, you may need some less than gentle persuasion with a rubber mallet to get it off.
Mojadito is offline   Reply With Quote
Old 09-05-2020, 09:49   #12
Registered User
 
Boatyarddog's Avatar

Join Date: Nov 2014
Location: Olympia, Washington
Boat: 1979 Mariner Ketch 32-Hull 202
Posts: 2,124
Images: 2
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Quote:
Originally Posted by Richard Harper View Post
On my Mercury I have to remove the nut from the lower half of the shift linkage
Yes, you do need to remove the Shift linkage lock nut.
SV Cloud Duster
Boatyarddog is offline   Reply With Quote
Old 09-05-2020, 11:28   #13
Registered User

Join Date: Mar 2015
Location: San Francisco Bay area
Boat: Condor Trimaran 30 foot
Posts: 1,501
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

5 lb sledge with wood placed between hammer and housing. Apply on blaster liberally overnight. Tap tap tap. Make sure lower end protected when she breaks free.
alansmith is offline   Reply With Quote
Old 09-05-2020, 14:10   #14
Registered User

Join Date: Jan 2014
Location: Ft. Lauderdale
Boat: Watkins 29
Posts: 409
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Did yiu remove the bolt that runs through the trim tab? That little fun on the bottom of the lower unit!
dennismenace111 is offline   Reply With Quote
Old 09-05-2020, 17:18   #15
Registered User

Join Date: Dec 2016
Location: Newport, RI
Boat: Lagoon 41 S2
Posts: 66
Re: Problem with Removal of Lower Unit - 15HP Yamaha Enduro 2 Stroke

Had the same problem with a 4hp Evinrude last week. The drive shaft was frozen to the crankshaft at the spline, it did not give up easily!
Library70 is offline   Reply With Quote
Reply

Tags
2 stroke, removal

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yamaha Enduro 2 Stroke 15HP Service Manual UFO Engines and Propulsion Systems 6 06-08-2023 05:13
Yamaha 15hp 2-stroke: Enduro or Leisure nhschneider Auxiliary Equipment & Dinghy 21 06-09-2014 07:44
Yamaha 15hp Enduro Charging Ability colemj Engines and Propulsion Systems 7 08-09-2012 20:03
15hp Yamaha Enduro - Ignition Issues blahman Engines and Propulsion Systems 14 23-03-2011 06:29
Want To Buy: Yamaha 15hp Enduro (Short Shaft) svpolaris Classifieds Archive 0 01-04-2010 16:44

Advertise Here


All times are GMT -7. The time now is 21:50.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.