Intermittent down trim

[buzzin hornet]

i need a little help.

My 1993 60hp mercury engine is suffering from the above. It trims up fine.

Any advice gratefully recieved.

regards

Buzzin

[buzzin hornet]

just a bit more info.

I put a new throttle assembly (not for this reason) on the boat last year and it still does it on both switches (one on throttle and one on engine)
Could it be a relay????

[Alzi]

Hi, Mine did the same thing last year on my mariner, I disconnected the pump wires , and tested with 12v battery , To try and eliminate a pump fault , But found the pump was faulty.it was crud in the internal reservoiur blocking a valve.
you van also just test the relays with a multimeter.

Where in the NW are you? , I Could help if Local

[buzzin hornet]

Rochdale

[Festinghouse]

my guess is the relays - had same trouble on my mariner 75. theyre 15quid each on ebay - i replaced all three (one is for starter) and never had another problem

[kubcat]

Has the same problem on my Suzuki DT200. Changed the relays and still had the problem. Looked closely at the pump wires and found the insulation had been stripped of a little near the pump end. Repaired it and no more problems.

[buzzin hornet]

Thanks to all

Will check wiring and if necessary change the relays.


Cheers


Buzzin

[buzzin hornet]

Can someone point me in the right part number for the relays if possible. Any help would be much appreciated

[Festinghouse]

my 75 had these 67-729 Mercury Mercruiser Solenoid Relay Tilt Trim Switch 89-818864 | eBay