Catalina - Capri - 25s International Assocaition Logo(2006)  
Assn Members Area · Join
Association Forum
Association Forum
Home | Profile | Register | Active Topics | Forum Users | Search | FAQ
Save Password
Forgot your Password?

 All Forums
 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Tohatsu Low Oil Pressure Warning Light
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  


Member Avatar

167 Posts

Initially Posted - 08/01/2020 :  08:11:06  Show Profile  Visit danandlu's Homepage  Reply with Quote
I service my Tohatsu 9.8 in the fall filling the crankcase to the top mark, maybe slightly over. Temperatures are cool then.

Fast forward to summer temps and running the outboard under load. Oil expands creating an overfull situation causing bubbles from the rotating crankshaft dipping into the oil. When one of those bubbles finds its way to the oil pressure sensor the sensor detects low, or zero, pressure triggering an RPM limiter (so I read and experienced) and turning on the red warning light. The episode(s) were very brief and caused me much concern until I figured it out.

Check your level, don't overfill.

Dan Henderson
1982 FK/TR #3328
Missoula, Flathead Lake, Montana

Master Marine Consultant

Members Avatar

8638 Posts

Response Posted - 08/01/2020 :  08:35:18  Show Profile  Reply with Quote
Good advice. Here's some more from a Tohatsu service shop. (I've seen these instructions elsewhere--particularly the "run and tip up" steps.)

Dave Bristle
Association "Port Captain" for Mystic, CT
PO of 1985 C-25 SR/FK #5032 Passage, ex-USCG-OUPV
Now on Eastern 27 Sarge (but still sailing when I can).

Passage, Mystic, and Sarge--click to enlarge.

Edited by - Stinkpotter on 08/01/2020 08:36:31
Go to Top of Page

Master Marine Consultant

Members Avatar

3444 Posts

Response Posted - 08/10/2020 :  05:19:08  Show Profile  Reply with Quote
Thank You for sharing that information.

Ray in Atlanta, Ga.
"Lee Key" '84 Catalina 25 SR/FK
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Association Forum © since 1999 Catalina Capri 25s International Association Go To Top Of Page
Powered By: Snitz Forums 2000 Version 3.4.06
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.