Please note this thread has been inactive for 90 days. For the best results, please start a new thread.
Results 1 to 5 of 5
  1. #1
    Cadet
    Join Date
    Sep 2006
    Location
    oklahoma
    Posts
    4

    Default 1967 Mercury 50 hp. no water flow

    I have no water flow. I pulled lower unit and took water pump apart ( Impeller was broken up in pieces). I removed all pieces I could find, then flowed water backward through pee hole to flush if there was small rubber peices . then i install new impeller closed up water pump and reinstalled lower unit. I hook up water to lower unit and start motor. after a few seconds there is a lot of steam coming out of the pee hole but no water. does anyone have a sugestion?
    any sugestions

  2. #2
    Commander
    Join Date
    Jan 2004
    Location
    Poulsbo, WA
    Posts
    2,073

    Default Re: 1967 Mercury 50 hp. no water flow

    When you had the lower unit off did you flow water up the water supply tube to see if you could get water to circulate thru the powerhead?

    If you can't, it's time for exploratory surgery which could include removing the water jacket cover over the spark plugs (watch out for stuck bolts!), or as extreme as removal of the powerhead to check for obstructions.

    You may have a chunk of rubber impeller way up in the water tube or in the powerhead, blocking water flow.

    Running water or blowing air up the supply tube will be very telling. Let us know what you find...........ed

  3. #3
    Cadet
    Join Date
    Sep 2006
    Location
    oklahoma
    Posts
    4

    Default Re: 1967 Mercury 50 hp. no water flow

    Quote Originally Posted by emckelvy
    When you had the lower unit off did you flow water up the water supply tube to see if you could get water to circulate thru the powerhead?

    If you can't, it's time for exploratory surgery which could include removing the water jacket cover over the spark plugs (watch out for stuck bolts!), or as extreme as removal of the powerhead to check for obstructions.

    You may have a chunk of rubber impeller way up in the water tube or in the powerhead, blocking water flow.

    Running water or blowing air up the supply tube will be very telling. Let us know what you find...........ed

  4. #4
    Cadet
    Join Date
    Sep 2006
    Location
    oklahoma
    Posts
    4

    Default Re: 1967 Mercury 50 hp. no water flow

    Quote Originally Posted by emckelvy
    When you had the lower unit off did you flow water up the water supply tube to see if you could get water to circulate thru the powerhead?

    If you can't, it's time for exploratory surgery which could include removing the water jacket cover over the spark plugs (watch out for stuck bolts!), or as extreme as removal of the powerhead to check for obstructions.

    You may have a chunk of rubber impeller way up in the water tube or in the powerhead, blocking water flow.

    Running water or blowing air up the supply tube will be very telling. Let us know what you find...........ed

    Thank you so much for your help!! I did take the power head off from around the plugs and found several chunks of ruber pluging things up.
    you have been a big help !!!
    thanks again
    Harold

  5. #5
    Cadet
    Join Date
    Jun 2010
    Location
    Idaho
    Posts
    6

    Default Re: 1967 Mercury 50 hp. no water flow

    I have a 67 95 horse with a bad block. What power heads will bolt on? will a later 115hp fit?

Similar Threads

  1. Block Water Flow & Water Cavity Pressure Testing
    By boatmon345 in forum Yamaha & Suzuki Outboards
    Replies: 5
    Last Post: May 23rd, 2006, 07:29 AM
  2. problems running in water and water flow through motor
    By brehlers69 in forum Boat Restoration, Building, and Hull Repair
    Replies: 4
    Last Post: March 8th, 2005, 06:58 AM
  3. 3hp Evinrude Yachtwin 1967 water flow
    By ncrofts in forum Johnson & Evinrude Outboards
    Replies: 3
    Last Post: February 12th, 2005, 03:21 AM
  4. Water Pump/Flow Question - 25 HP Tracker Marine (Mercury)
    By Deep Hull in forum Mercury & Mariner Outboards
    Replies: 2
    Last Post: July 9th, 2004, 11:28 AM
  5. 15 HP Mercury water flow
    By tolmaz in forum Mercury & Mariner Outboards
    Replies: 2
    Last Post: April 7th, 2004, 05:43 PM
  1. iboats Forum Directory - Over 100,000 forum posts organized by topic