Trim Short Question - '85-86 Oil Injected 175 Black Max

[K.Smith]

I have an '85-86 Oil Injected Mecrcury Black Max 175hp on my '85 Ranger 370V. I have some kind of short or switch failure on my trim unit. It runs continualy when the boats main power is on. I have disconnected all three switches individually and have had the same problem. Is there some place that I should start looking? Everything else on the boat seems to be functioning correctly. Any help would be greatly appreciated.

 

[DHPMARINE]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

K. by all 3 switches are you including the one on the motor?I know you Ranger guys have all types of gadgets.<br /><br />DHP

 

[KCLOST]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

DHP, he will have a switch at the front of the boat, at the throttle arm, and at the rear right corner of the boat near the transom... <br /><br />If you have checked all, you must have a problem in the main wiring harness... Something is worn and shorting it out....Meaning, something is providing power to the motor besides the switches.... Check all the wires carefully

 

[chuckz]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

I would suspect all those switches operate a single relay. I would trace back the wiring and see if there isn't a faulty relay sticking on.

 

[LubeDude]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

I agree with L.I. Chuck, I think you have a relay sticking under the cowl. I actually have had this happen on a 75 HP Evenrude one time.<br /><br />Oh, and welcome, "Fellow Bass fisherman", there are a number of us here at Iboats. If ya get up here to the southern Oregon coast, Ill give ya a clue as to where to fish on Ten Mile Lakes.

 

[albass]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

I"m having the same problem on my 75hp Merc on my Ranger right now. How do I test to see if the relay or solenoid is the problem?

 

[Ben Konopacky]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

twitch13; to check the sol.w/o any power on see ifyou have continuaty across the main contact of either sol.,they should show some res.,if it shows little or no res.that sol .is the one keeps it engaged. (contacts are fused)Replace sol.hope this helps for a start...

 

[albass]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

Ben lucky I checked all the switches and all were good checked the solenoid and thought they tested ok but when I put a wrench to one of the post to remove wire it broke off in my hand problem solved thanks

 

[LubeDude]

Re: Trim Short Question - '85-86 Oil Injected 175 Black Max

Dont ya wish it was allways that easy and cheap??<br /><br />Glad ya found it.