User Tag List
Thanks: 0
Results 1 to 15 of 18
Thread: Mercury 2.5 245HP powerhead
-
09-28-2021, 07:27 PM #1
-
pkstv, sicknick12 liked this post
-
10-10-2021, 04:27 PM #25000 RPM
- Join Date
- Aug 2006
- Location
- GA
- Posts
- 855
- Thanks (Given)
- 1
- Thanks (Received)
- 25
- Likes (Given)
- 35
- Likes (Received)
- 71
- Mentioned
- 2 Post(s)
- Tagged
- 1 Thread(s)
Nice & Clean
-
10-11-2021, 04:27 PM #3Screaming And Flying!
- Join Date
- Jul 2002
- Location
- FT WORTH, TEXAS
- Posts
- 8,031
- Thanks (Given)
- 9
- Thanks (Received)
- 146
- Likes (Given)
- 313
- Likes (Received)
- 503
- Mentioned
- 1 Post(s)
- Tagged
- 0 Thread(s)
must be steel steel sleeves
-
Dave Strong liked this post
-
10-12-2021, 06:34 PM #4
Pulled the heads. All holes appear to be steel based on the cross hatching in the cylinders. All holes are 20 over. Pistons are all Promarine based on the part numbers. Block is a clean freshwater block based on the water passages. The heads were also decked based on the hatching on them as well. Will need head gaskets unless I can track down a replacement set.
-
10-21-2021, 08:36 AM #5
Looks like a nikasil. What do the bores measure? GLWS, these are great motors and are very strong.
1973 Viper - sold
1978 Viking - sold
1995 XB02
-
10-21-2021, 08:12 PM #65000 RPM
- Join Date
- Sep 2006
- Posts
- 144
- Thanks (Given)
- 1
- Thanks (Received)
- 1
- Likes (Given)
- 14
- Likes (Received)
- 4
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Is this a big bearing or small bearing powerhead?
-
10-22-2021, 10:44 AM #7Member
- Join Date
- Apr 2020
- Location
- South Carolina
- Posts
- 85
- Thanks (Given)
- 0
- Thanks (Received)
- 4
- Likes (Given)
- 1
- Likes (Received)
- 5
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
10-22-2021, 07:15 PM #8
Small holes out the adapter plate and keep it warm and regulate the water using poppet dump. And more clearance on the piston to cylinder.
http://www.us1.cc/racingcoolingsystem.html1973 Viper - sold
1978 Viking - sold
1995 XB02
-
scott reierson liked this post
-
10-22-2021, 11:39 PM #9
Small bearing unless it was modified for a big bearing & the crank was sleeved or changed. That has got to be a plated .020 over motor.....those sleeves do not like like cast iron liners to me...?
I have a boat or two.... that I never get to drive
-
rjdubiel liked this post
-
10-23-2021, 09:03 PM #10Member
- Join Date
- Apr 2020
- Location
- South Carolina
- Posts
- 85
- Thanks (Given)
- 0
- Thanks (Received)
- 4
- Likes (Given)
- 1
- Likes (Received)
- 5
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
10-24-2021, 07:55 AM #11
Ring gap is based of bore size. All depends on Pistons too. Forged Pistons need to add .003 to the piston to cylinder clearance. The piston will heat and swell faster than the steel sleeve so need the extra clearance to not scuff
1973 Viper - sold
1978 Viking - sold
1995 XB02
-
10-24-2021, 08:08 AM #12
-
10-24-2021, 08:09 AM #13
Back to this for sale post. Has the seller replied to anyone?
1973 Viper - sold
1978 Viking - sold
1995 XB02
-
10-25-2021, 06:46 AM #14
I replied to all my PM's.
Like I said in the first and second post, I did not build the motor nor have someone build it for me. I bought it just as you see it, so I am not sure on the specs as to the bearing size. all 6 sleeves are steel.
-
10-25-2021, 08:25 PM #15
Interested, how long would you be willing to hold it if you got a down payment? I live in Cali and have family in NJ...not sure when I would make it out that way next.
Similar Threads
-
Need a top cowl pin for my Mercury 2.5 245hp
By Leebone46 in forum Parts WantedReplies: 0Last Post: 06-02-2017, 01:20 PM -
91 mercury 2.5L (carb) 245hp
By Ale6894 in forum Technical DiscussionReplies: 22Last Post: 10-29-2016, 04:34 PM -
1993 Mercury 2.4 245hp
By gavinbird in forum Outboard EnginesReplies: 26Last Post: 11-20-2014, 06:14 AM