Association Forum - Yamaha 9.9 4 stroke oil seepage

Assn Members Area · Join

Home.

Association Forum

Ships Store

Cruising

Racing

Technical Tips

Photo Gallery - New

Boat Search - Updated

Manuals & Brochures

Swap Meet

Links

Officer Flag Line & Staff

Bylaws & Constitution

Members Area

Join the Association

Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.

Association Forum

Username:	Password:
Save Password
Forgot your Password?

All Forums

Catalina/Capri 25/250 Sailor's Forums

General Sailing Forum

Yamaha 9.9 4 stroke oil seepage

New Topic

Topic Locked

Printer Friendly

Author

Topic

n/a
deleted

Member Avatar

7 Posts

Initially Posted - 11/26/2001 : 11:23:57

This past season, I noticed my 1992 Yamaha 9.9 4 stroke would smoke fairly heavily after startup , then lightly during normal operation. I removed it from my sailboat and laid it down on the garage floor for about a month; this weekend, I installed it in

Edited by - on

Gary B.
Admiral

Members Avatar

USA
969 Posts

Response Posted - 11/26/2001 : 11:45:47

I can't answer your question, exactly, but I would be suspecting a cracked ring, perhaps. When you laid it on the garage floor, you put it down the way you're supposed to, right? Most 4 strokes have to be placed one of two ways when laid down. If you'r

Edited by - on

OJ
Master Marine Consultant

Members Avatar

USA
4382 Posts

Response Posted - 11/26/2001 : 12:25:34

Are you aware that there are only two positions that you can "lay down" the Yamaha 9.9 four stroke? See your manual. My motor got minimal use this past summer and I also got a small puff of blue smoke at start up - motor runs great though - with no smok

Edited by - on

Gary B.
Admiral

Members Avatar

USA
969 Posts

Response Posted - 11/26/2001 : 21:04:38

BTW: To add to my previous post: If this was a car engine, I would suspect the valve guides, just as you have. It does sound like the right diagnosis. Good luck. Gary on Encore!

Edited by - on

Arlyn Stewart
Master Marine Consultant

Members Avatar

USA
2984 Posts

Response Posted - 11/27/2001 : 14:59:56

Steve is on the mark... likely no problem with motor as it just hydro locked with oil in cylinder...funny thing...it wont compress. Be sure to lie the motor only in proper position in future and you will likely be ok.

Arlyn C-250 W/B #224

Edited by - on

n/a
deleted

Members Avatar

7 Posts

Response Posted - 11/27/2001 : 21:28:44

Thanks all. I went back and read the owners manual and you're all correct. I didnt pay attention to the page on permissable ways to store the motor.

However, I wm going to check the valve clearances and at the same time, try to assess the condition of

Edited by - on

Arlyn Stewart
Master Marine Consultant

Members Avatar

USA
2984 Posts

Response Posted - 12/02/2001 : 16:14:00

IMHO the oil in the cylinder was more likey from that seeping thru ring gap than valve guides. Remember...that a cold engine has more ring gap than a hot one. The stored motor had lots of time and when thinking about it...if hydro lock occurred during l

Edited by - on

Topic

New Topic

Topic Locked

Printer Friendly

Jump To:

Association Forum

Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.