iboats - The #1 Store For Everything Boating
 
  #1  
Old September 21st, 2002, 03:05 PM
williezwildcat williezwildcat is offline
Cadet
  
Join Date: Sep 2002
Posts: 4
Default Compression on 1988 Yamaha 90
Owner did a compression check, and readings came in 110-115 psi on all three cyls. Is this below, avg, or above what a motor of this age shld have. This board is great, thanks for your help.
Reply With Quote
  #2  
Old September 21st, 2002, 03:26 PM
snapperbait's Avatar
snapperbait snapperbait is offline
Vice Admiral
  
Join Date: Aug 2002
Posts: 5,762
Default Re: Compression on 1988 Yamaha 90
Average.. As long as it's above 100psi and all cylinders are within 10 psi of each other .. So it looks A-OK..
__________________
Now understand, Commander...
That torpedo did not self destruct...
You heard it hit the hull...
And I...Was never here...
Reply With Quote
  #3  
Old September 22nd, 2002, 04:08 PM
John from Madison CT John from Madison CT is offline
Petty Officer 2nd Class
  
Join Date: Oct 2001
Location: CT
Posts: 175
Default Re: Compression on 1988 Yamaha 90
You are in great shape with that compression. Enjoy what I consider to be one of the most reliable engines ever made.John
Reply With Quote
Reply

« Previous Thread | Next Thread »

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help - 1988 3.7L Bad compression kevindineen Mercruiser, OMC, Volvo & other I/O & Inboard Engines & Outdrives 22 August 10th, 2006 05:22 PM
Compression for 1988 140 Evinrude havinfun Johnson & Evinrude Outboards 2 January 27th, 2004 04:40 PM
Compression on 1988 175 Johnson Chum Slick Johnson & Evinrude Outboards 2 July 18th, 2003 11:04 AM
Compression on 1988 70 hp evinrude Tonja Johnson & Evinrude Outboards 4 July 11th, 2003 03:00 AM
HELP HELP hard steering, good compression though. yamaha 150 1988 letsbarbq Yamaha & Suzuki Outboards 4 January 10th, 2002 03:32 PM

iboats Forum Directory
Over 100,000 forum posts organized by topic
Outboard Motor Topics
Mercury Outboards
Johnson Outboards
Evinrude Outboards
Force Outboards
Yamaha Outboards
Mariner Outboards
Suzuki Outboards
Honda Outboards
Chrysler Outboards
Tohatsu Outboards
Nissan Outboards
Outboard Motors: non-repair
Vintage Outboards

I/O and Inboard Topics
MerCruiser
OMC I/O, Inboard
Volvo Penta

Propeller Help
Boat Propellers

Boat Repair and Products
Boat Building and Repair
Fiberglass Boat Repair
Marine Electronics
Boat Trailers and Towing
Boat Names
Boat Covers
Boat Parts

Boating Activities Talk
Boating Topics and Questions
Boating Activities and Destinations
Boating Blunders
Boat Shows
Wakeboarding
Water Skiing

Fishing Discussions
Freshwater Fishing
Saltwater Fishing

Boat Type Topics
Aluminum Boats
Bass Boats
Bowrider Boats
Center Console Boats
Cruiser Boats
Cuddy Cabin Boats
Deckboats
Fishing Boats
Fish and Ski Boats
Houseboats
Jet Boats
Jon Boats
Pontoon Boats
Powerboats
PWC Forum
Ski Boats
New Boats
Used Boats

Boat Manufacturers
Boats 250+ Manufacturers
Bayliner Boats
Sea Ray Boats
Zodiac Boats



Outboards
Power Heads
Lower Units
Propellers
Inflatable Boats
Boat Manuals
Engine Parts

All times are GMT -4. The time now is 08:26 PM.


Contact Us - iboats Forums Home - Privacy Statement - Top