So, this is my first post in this forum.
I bought a used 82' 70hp Johnson. It needed a few minor fixes, and one was the power tilt and trim.
There were two problems. The fluid reservoir was bone dry and the motor would work intermittently.
I'll address the reservoir first. I bought two bottles of TNT fluid and filled the pump. Pressed the up button and wahlah.....nothing... the motor was working, but the engine wouldn't tilt or trim. So I tried to bleed out some air, which requires it to be raised and lowered. So, I performed this by hand a few times, and pumped in some more fluid until it reached the fill screw. Hit the button again, and same thing, no movement. I thought to myself....self, why are you able to raise and lower this by hand, shouldn't this be a closed hydrolic system? So I did some research and probing and found that I had a leak coming from the manual release screw. Took it out and replaced the o-ring. ($0.50 or something). Filled her up again (with two new bottles of fluid, the original fluid fill leaked all over my grass). This time.....yay...it worked, sluggish, but with a couple of full cycles.... it worked great.
But, don't party yet, the TNT motor would work for about 30 seconds and quit. Then if you wait about 20 more seconds it would work for 5 more and quit. Back to the internet research. It confirmed my suspicion, the relays were bad. Well, they weren't really bad, they were a little marred and corroded. So, i fixed this by sanding down the contacts and scraping some black sticky substance from the terminals. I plugged in the relays and crossed my fingers..... success.
Sorry this post was so long, but I figured I would put enough key words in my post so someone's research would be aided a little more than mine was.
I bought a used 82' 70hp Johnson. It needed a few minor fixes, and one was the power tilt and trim.
There were two problems. The fluid reservoir was bone dry and the motor would work intermittently.
I'll address the reservoir first. I bought two bottles of TNT fluid and filled the pump. Pressed the up button and wahlah.....nothing... the motor was working, but the engine wouldn't tilt or trim. So I tried to bleed out some air, which requires it to be raised and lowered. So, I performed this by hand a few times, and pumped in some more fluid until it reached the fill screw. Hit the button again, and same thing, no movement. I thought to myself....self, why are you able to raise and lower this by hand, shouldn't this be a closed hydrolic system? So I did some research and probing and found that I had a leak coming from the manual release screw. Took it out and replaced the o-ring. ($0.50 or something). Filled her up again (with two new bottles of fluid, the original fluid fill leaked all over my grass). This time.....yay...it worked, sluggish, but with a couple of full cycles.... it worked great.
But, don't party yet, the TNT motor would work for about 30 seconds and quit. Then if you wait about 20 more seconds it would work for 5 more and quit. Back to the internet research. It confirmed my suspicion, the relays were bad. Well, they weren't really bad, they were a little marred and corroded. So, i fixed this by sanding down the contacts and scraping some black sticky substance from the terminals. I plugged in the relays and crossed my fingers..... success.
Sorry this post was so long, but I figured I would put enough key words in my post so someone's research would be aided a little more than mine was.
