1994 200hp Mariner Tilt and Trim question.

[Seascout3]

1994 XL PTO ID# 0G000919. Took the boat out yesterday. Due to being almost deaf, I did not notice that my trim switch on the throttle was stuck in the up position. I ran about 3 miles and came down to no wake speed. Tried to throttle back up and no matter how much throttle I gave to the engine it would not increase in speed. I did not notice rpm reading. Noticed the stuck trim switch and got it back in the off position. Tried the trim switch and it would not tilt. Waited a little while and trim started working and motor would respond normally. This is what I think went on.
1. Tilt motor overheated and overtemp switch kicked in like it should.
2. After reseting the switch, tilt motor cooled and resumed working.
3. Motor resumed working normally.

In reading my manual it says that the Tilt trim will not go past 20 degrees lift if the engine is above 2000 RPM.

My question is - if you are at 20 degrees up position, is there also a rpm limiting control on the engine to keep it around 2000 rpm (seems about how fast I was running) even while giving it lots of throttle? If not I have another problem.

Thanks

ED

 

[j_martin]

Re: 1994 200hp Mariner Tilt and Trim question.

There are no sophisticated interlocks. What happens is that above a certain forward force, the engine will overpower the tilt cylinder, but will not overpower the trim rams, thus the trim is limited by the length of the rams. At slow speeds you can tilt it out further, for instance to get over obstacles.

I suspect the engine was really screaming if you gave it full throttle while tilted all the way out. I also believe the water pump has been damaged.

Sorry
John

 

[Seascout3]

Re: 1994 200hp Mariner Tilt and Trim question.

John,
My post may not have been clear. My motor never came out of the water. It was limited to 20 degrees up by the fact that I was running over 2000 rpm. When I trimmed it a little while running at that speed, the up switch stuck in the up position. Although the tilt/trim pump continued to run the motor never trimmed more than 20 degrees causing the tilt/trim pump motor to overheat and shut down. While this was going on, I noticed my voltage guage was showing only 12 volts, not the normal 13-14 volts. Thats when I noticed the switch was stuck in the up position. When I unstuck the switch, voltage went to normal. If all this did not affect engine throttle response I guess I may have a throttle cable binding issue even though it feels normal. I guess I may have to see if the throttle response problem comes back since I have resolved the trim switch problem. Sorry for saying "tilt" when I meant "trim". I also keep say 20 degrees because that it what the manual says, but I think I used to be able to trim up far enough to start cavitating.

Thanks

ED