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Jeff G.
Jeff G., Marine Mechanic
Category: Boat
Satisfied Customers: 4728
Experience:  42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance
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Johnson outboard, 1993 J88MSLETESuddenly tilt goes up but

Customer Question

Johnson outboard, 1993 J88MSLETE
Suddenly tilt goes up but not down, Manual release valve it only goes down to the top of the trim area. trim doesn't go down.
Filled reservoir, lowered by release valve, powered tilt up toped of reservoir over and over.
Tilt motor runs and sounds the same but doesn't lower motor.
Checked shuttle valve visually. Seemed clean. Don't know what to look for.
Please help
Submitted: 2 years ago.
Category: Boat
Expert:  Jeff G. replied 2 years ago.
On your motor the manual relief only allows tilting not trimming of the engine, so you don't enter the trim range.You do have a trim limit switch on the tilt tube under the powerhead/ cowl. Did you try to readjust the switch? Is the trim motor running when you try to trim down?Here is a test;Temporarily install another manual relief valve. If it now works replace the valve, if still the same put the original one back in. You'll have to bleed the system. Make sure you take the C clip out before taking the valve out and hold a rag over the valve to protect from fluid under pressure.Is the trim motor running as fast in down as it is in up mode?
Expert:  Jeff G. replied 2 years ago.
Hi is there anything else I can help you with on this?
Please don't forget to rate my service to you. Thanks