Logo
Results 1 to 2 of 2
  1. #1

    Default Johnson 1974 20 hp : it leaks a thick, sticky, black oil.

    Johnson 20 hp , 1974 engine...........after I run it and park it, I come back to find it has leaked a thick, sticky black oil. What's up ? Ideas ? Advice welcome. Louie in KY

  2. #2
    Join Date
    Sep 2010
    Location
    ontario
    Posts
    13,807

    Default Re: Johnson 1974 20 hp : it leaks a thick, sticky, black oil.

    This topic seems to come up every day !-----Could be normal on a 2 stroke motor.-------------But if you are worried about it do the following.---------Inspect your fuel pump diaphragm for a tear.-----------Check the thermostat found on top of the cylinder head.--------------And pressure test the lower unit in case it is leaking.

Similar Threads

  1. Help - 1994 Johnson 115 2 stroke - Sticky neutral??
    By l0newolf in forum Johnson Evinrude Outboard Forum
    Replies: 12
    Last Post: 03-27-2011, 04:02 AM
  2. Gasket material 006 thick
    By jlash in forum Chris Craft Engine Forum
    Replies: 1
    Last Post: 11-20-2009, 10:01 PM
  3. Thick 2 BBL carb base gasket Part #
    By guyjg in forum Mercruiser Sterndrive Archive
    Replies: 6
    Last Post: 09-27-2009, 01:54 PM
  4. QJet Thick Gasket
    By btmline in forum Mercruiser Sterndrive Archive
    Replies: 2
    Last Post: 07-23-2009, 12:42 AM
  5. Thick 470 carb base gasket
    By mark_searay in forum Mercruiser Sterndrive Archive
    Replies: 8
    Last Post: 04-23-2009, 11:32 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •