1. Use the full 4 digit year for everything you are asking your question about. Example: 1962, 1988, 2000, 2011
2. Include the correct name of your Whaler model. Example: Montauk 17, Montauk 170, Outrage 26, Outrage 260
3. Include the length when necessary. Example: 16, 17, 18, 20, 22
4. Do not post your email address anywhere on this site as it is already in your user profile.

Water Pump on a 25hp Yamaha 4 stroke
awayland	#1  Posted on 08/16/11 - 6:49 AM
Member Personal Page Posts: 160 Comments: 0 Joined: 04/30/09	Going to help a friend change a water pump impeller on his 10 year old Yamaha 25hp 4 stroke. I've changed many over the years on Mercruiser sterndrives, Mec. outboards, and several OMC's. Is there anything majorly different on this unit? Like disconnecting shift linkage etc... He said it overheats at idle and the tell tail is weak, but is ok when RPMs are up. I suggested an impeller, he said it's never been changed. Only ever been used on a small fresh water lake. Any insight on what to expect would be greatly appreciated. Thanks Tom 1970 custom 16 with 1999 Merc 2 stroke 90hp
Phil T	#2  Posted on 08/16/11 - 7:47 AM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	It should be straight forward. I would pull the thermostat and check it too. 1992 Outrage 17 I 2019 E-TEC 90, Viper 17 2+ 2018 Load Rite Elite 18280096VT
awayland	#3  Posted on 08/16/11 - 5:49 PM
Member Personal Page Posts: 160 Comments: 0 Joined: 04/30/09	thanks phil good point! 1970 custom 16 with 1999 Merc 2 stroke 90hp