I have a tilt/trim unit that I have acquired on a parts motor that I was looking at installing on a 91 Force 70 Hp without trim. I know the trim unit worked a couple of years back when put in storage. The rubber coating on the power wire going inside (top connection on trim motor) has all but...
Four wires are found under the dash, Red, Orange, Purple, Black.
Red - 12 Volt Power When Key is on
Orange - ASSUMING Heat Alarm based on reading posting forum
Purple - ASSUMING Tach
Black - ASSUMING Ground
Red and Orange were connect to leads of warning horn
Purple and Black not connected to...
Buddy has the above motor that has lost the bottom cyclinder. Inspection camera shows top of piston melted best one can tell without pulling the head. No compression at all on that cyclinder, other two fine. Lower unit is all original and has never had issues. Locals with opinions suggested...
I recently installed a "new to me" 88 SPL on a 20 foot toon. On the first trip out it became apparent I had a prop mismatch and ended the trial run rather quickly, 4200 rpm at WOT. I ended up with a 13 pitch prop and had 5200 RPM WOT with what I would consider a medium load of passengers/gear...
Without going into to much unnecessary detail, I have swapped motors on my boat and wish to reconnect the water pressure gauge that was installed for the previous motor. The prior motor had a plug that I removed that allowed the brass fitting to be installed for the gauge. The new motor, 1990...
Motor is a 1990 88 SPL Johnson
Boat is a 20 Foot Harris Pontoon
Current Prop is a Solas
Stamped info on prop is OD 3X 13.5 X 15 R
Guessing the 3 means 3 blade (as it is)
13.5 is pitch
15 (????? diameter ????)
R (????? right rotation????)
First...
Without repeating everything from an earlier post "88 SPL ?" I have a 1990 gearcase that I had planned on swapping the drive shafts between the two housings, keeping the same prop shaft and gears.
The 1994 is a two piece shaft, the 1990 is a one piece shaft. Other than needle bearing at the...
I have a lower unit that is heavily pitted and the seals need replacing. After pricing seals I found a "guaranteed" lower unit and opted to do a whole unit exchange rather than a repair. After comparing the two lower units there is a noticable difference in the O-Ring groove that slides into...
Have a 1990 Mariner 75 HP with oil injection tank mounted on engine. Oil injection is direct drive with no motion sensor to alert to failure. I am going to disconnect and premix fuel with plans to disable the injector. Anyone ever tried draining the oil tank, refilling it with Sea Foam and...
I have a 1990 Mariner 75 HP (serial 0B361162) that has an oil injector still connected and is still working. I plan to disconnect and go with premix fuel. Please note the topic of this post, Not a discussion on whether or not to disconnect but rather is a kit needed or available to bypass the...
First off, let me apologize for the length of this post but I have an issue that has existed ever since I bought the motor 6 years ago used and I wanted to fully describe the problem as well as what I have tried to this point.
If the motor sits for any length of time without being run, when I...
The 75HP Mariner (1989) has 3 carbs and runs perfect once it has been in the water for a short period. To give a few more details, the engine will go weeks without being run. It will run on muffs and idles great. Put it in the water and throw the fuel to it and it runs but floods, getting...
