Logo
Click for Nissan Tohatsu Manuals, and Parts!
Results 1 to 7 of 7
  1. #1

    Default Tohatsu powerhead corrosion

    Hi
    I own an 18 hp tohatsu which I brought new.
    I have had no end of trouble with paint falier/corrosion around the gasget on the power headed
    so far I've been through two paint jobs and a new power head and still having problems its doing my nut.
    I am thorough with my cleaning and servicing.
    Has any one else had problems with corosion on Tohatsu outboards
    cheers

  2. #2
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,056

    Default Re: Tohatsu powerhead corrosion

    What is your actual model? Is there some problem with paint sticking near the gasket parting line of the cylinder head? Did you seriously change entire power heads because of flaking paint? If the aluminum is properly etched, the touch-up paint should adhere very well.
    Paul
    Buffalo NY USA

  3. #3

    Default Re: Tohatsu powerhead corrosion

    So you bought it in 1987 and have parked it in salt water for 30 years and you see a little corrosion.
    Seriously, you didnt give us many facts. Do you have any zink annodes anywhere on the motor?
    I notice they are available generically in all kinds of shapes and sizes. I bet they will help.
    I think if I was doing touchup, I would be using a two part epoxy primer used on aircraft and
    obtained from Aircraft Spruce and Speciality and wouldnt really care about the paint color match.

  4. #4

    Default Re: Tohatsu powerhead corrosion

    The model is an 18E2. I have owned it for two years from new. It has been well maintained and all the manufacturers servicing done.
    the anodes are fine.
    is this a common problem with Tohatsu outboards?

  5. #5
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,056

    Default Re: Tohatsu powerhead corrosion

    No, no different than any other manufacturer. If the anodes are OK, I would do a Proper cleaning and repaint. Exactly where are you having problems keeping the paint adhered?
    Paul
    Buffalo NY USA

  6. #6

    Default Re: Tohatsu powerhead corrosion

    The problem is around the gasget area on the powrehead. If you bought a brand new car and the paint fell off not once but three times would you be happy with the product?

  7. #7
    Join Date
    Mar 2010
    Location
    Buffalo, NY, USA
    Posts
    2,056

    Default Re: Tohatsu powerhead corrosion

    What methods were used to prep and paint? Exactly where is the "gasket area on the powerhead"? Is that where the cylinder head mates to the block? Where the crank casting mates to the cylinder casting? Where the exhaust cover bolts to the block? Or where the block mates to the drive shaft housing? Those areas aren't visible when the cowl is installed; If there is just a paint adhesion problem, odds are that proper etching is needed before a touch up. If it seems that there is a structural failure of a casting, I would contact the dealer to see whether this would be a warranty item. The M18E2 has not been available in North America for over a decade, so I am not familiar with newer production of those motors... all of ours are getting pretty long in the tooth.
    Paul
    Buffalo NY USA

Similar Threads

  1. Mercury/ Tohatsu 9.9/ 9.8 Powerhead swap
    By griffy1891 in forum Nissan Tohatsu Outboard Forum
    Replies: 1
    Last Post: 02-10-2016, 11:59 AM
  2. Mercury/ Tohatsu 9.9/ 9.8 Powerhead swap
    By griffy1891 in forum Mercury Mariner Outboard Forum
    Replies: 1
    Last Post: 02-09-2016, 03:03 PM
  3. New Tohatsu tach in a new Tohatsu 30 hp doesn't work!!
    By firetiger in forum Nissan Tohatsu Outboard Forum
    Replies: 9
    Last Post: 11-20-2013, 05:53 AM
  4. 1998 90 hp tohatsu powerhead
    By olivemw in forum Nissan Tohatsu Outboard Forum
    Replies: 5
    Last Post: 02-21-2010, 08:20 PM
  5. Dps corrosion
    By tjm in forum Volvo Penta Gas Archive
    Replies: 4
    Last Post: 10-12-2007, 09:20 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
  •