- Your online store for all types of marine engines and boat parts.
Monday - Friday
9:00 AM - 5:00 PM EST
Click for TOLL-FREE Number
Secure Online Payments
Special $9.95 Flat Rate Shipping
(800) 209-9624 | Home | Contact | Shipping | Returns | Cart View your shopping cart.
Search by Part Number
Enter engine/drive part number.
Original & matching parts for sale.
Manuals & Accessories
Shop by description, item number
or manufacturer's model number.
Why shop with us? Check our reviews! Why Us & Reviews   Boat Repair Forum Boat Repair Forum   Boat Video Gallery Video Gallery
Results 1 to 4 of 4
  1. #1
    P-bouy's Avatar
    P-bouy Guest

    Default " I am purchasing a used boat

    " I am purchasing a used boat with '98 model 115 Yamaha inshore - the compression was 140 on top two plugs and the bottom two read 135. Is this in the normal range? Also, the plugs were a little wet when I removed them - could this be condensation from being stored in a shed and is that a problem. Thanks!!! "

  2. #2
    Join Date
    Feb 2002
    Bonneau, South Carolina, USA

    Default " That is good compression. A

    " That is good compression. A little valvetec will bring the compression up on the 2 bottom cylinders by cleaning the carbon out of the engine. If the plugs are wet with water then there could be a problem, but if they are wet with gas/oil then its probably ok. If the owner will let you then you should take the boat for a test drive and make sure its ok. If you are buying the boat from an individual then take it to a good boat shop and have them check it out before you buy it. Even if you are buying it from a dealer see if they will let your mechanic check it out. "

  3. #3
    p-buoy's Avatar
    p-buoy Guest

    Default thanks for your advice - have

    thanks for your advice - have a good one!

  4. #4
    Richard Heilman's Avatar
    Richard Heilman Guest

    Default I am buying a 1995 Grady with

    I am buying a 1995 Grady with two 200HP Yamaha outboards. The dealer will do a compression check on Wednesday. What would be a good (or acceptable) compression reading on these motors?

Similar Threads

  1. 1992 4.3 Yamaha/Yamaha LU Shift Problems
    By Captain Jack Shallows in forum Other Gas Inboard Mfgs IO and Sterndrive Questions
    Replies: 4
    Last Post: 12-18-2010, 01:35 PM

Posting Permissions

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