Thread Tools Display Modes
Old 06-22-2016   #1
Boulder, Colorado
Paddling Since: 1999
Join Date: Jun 2009
Posts: 7
Raft motor mount

I just built a new motor mount last month for my 16' NRS raft, to use on our Cat trip. Just got back, and big drops were crazy. Flipped in Big drop, and the engine was under water for about an hour. I could not believe we got the engine running again. Pulled spark plugs, and drained the carb. Fuel stayed clean. It started right up. The mount and rear rail worked great! I thought I would share since the Forums helped me with design and build ideas. I had just bought a Tig welder, and was ready for a project. I started the design with a transom for a mount that connects to the new rear section with pins. Each part is removable with pin and allen wrench. After a failed test on the lake I changed the design to a fixed motor mount. One that is closer to the the rubber and adjustable with bolts. I have add both photos so you may see the change. I felt the engine (10hp/ 4 stroke/ 100lbs/long shaft) was to heavy for the way the transom works. When I lowered the engine the transom, the motor falls away from the the frame about 16" and puts a lot of torque on the rubber tubes. The tubes and floor of the raft would flex and create a lot of drag when the engine is throttled up. I would recommend a smaller engine when using a transom. Like a 4.5 hp 2-stroke, short shaft. After the poor results with the transom, I built a fix motor mount set to the correct height for my engine, and then using the tilt feature on the engine to raise and lower the motor. This gave fantastic results and if needed the ability to even use a larger motor just for fun, or running Cataract with the engine. The new back decking was a lot of work (way to much for a 1st project), but was sweet, and worth it when walking around my gear and tying things off. We averaged 8mph pushing 3 rafts with the 10hp engine. I hope this helps any future motor mount builds.
Attached Thumbnails
Click image for larger version

Name:	1.JPG
Views:	143
Size:	519.0 KB
ID:	11804   Click image for larger version

Name:	2.JPG
Views:	141
Size:	89.5 KB
ID:	11805  

Click image for larger version

Name:	3.JPG
Views:	159
Size:	138.0 KB
ID:	11806   Click image for larger version

Name:	4.JPG
Views:	138
Size:	129.8 KB
ID:	11807  

Click image for larger version

Name:	5.JPG
Views:	154
Size:	122.6 KB
ID:	11808   Click image for larger version

Name:	6.JPG
Views:	139
Size:	113.5 KB
ID:	11809  

Click image for larger version

Name:	7.JPG
Views:	164
Size:	129.8 KB
ID:	11810   Click image for larger version

Name:	8.JPG
Views:	131
Size:	96.5 KB
ID:	11811  


kenblackboater is offline   Reply With Quote
Old 06-23-2016   #2
2kanzam's Avatar
Charleston, West Virginny
Paddling Since: 1996
Join Date: Aug 2012
Posts: 461
Holy hell...that thing looks like a mid-evil armored horse going to battle.


2kanzam is offline   Reply With Quote
Old 06-29-2016   #3
Join Date: Jul 2005
Posts: 17
TIG envy.
speadlight is offline   Reply With Quote
Old 06-29-2016   #4
vail, Colorado
Paddling Since: 2011
Join Date: Apr 2016
Posts: 2
This is a badass setup
cgolas is offline   Reply With Quote

Thread Tools
Display Modes

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
Topic Thread Starter Forum Replies Last Post
NRS raft motor mount seating options Mopdog Rafting | Gear Talk 9 01-04-2016 08:55 AM
Motor Mount for 18 foot Sotar ST raft Yukon77 Whitewater Rafting 2 02-26-2013 01:44 AM
Motor Mount tanderson Whitewater Rafting 5 02-14-2013 07:16 PM
nrs cataraft motor mount question mania Kayaking | Gear Talk 8 11-01-2010 01:41 PM
Raft Motor Mount Methods nicho Whitewater Rafting 10 09-27-2009 02:26 PM

» Classified Ads
12' Hyside SB

posted by kevin paulson

Well used but loved early 80's 12' Hyside SB. Rubber Only....

Aire Tributary

posted by bronzelife

Raft, trailer and all pictured accessories. 2 seats 1...

Raft Trailer 8x12

posted by tbirk

8x12 Raft Trailer. -Full size spare -Winch -Rollers...

Powered by vBadvanced CMPS v3.2.3

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:39 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.