Gee, my 1973 and 1977 Mercs as well as my 1993 Merc have the "W" machined into the crank and flywheel. The pasts breakout of the OP's motor did not show a flywheel key. While it is true that I never worked on the OP's motor, I think it likely he doesn't have a flywheel key.
The fuel pump condition does not affect the starting of the motor, as the primer bulb fills the carbs with fuel. The fuel pump will only affect the running of the engine at high speed or after she idles for a couple of minutes to use up the fuel in the carbs.
On the backdrag carbs, there is...
Mark, 1 shot of starting fluid is not going to wash off the oil he has been giving it by cranking and choking. Hence the reference to 1 shot.
Racerone, most Mercs do not have flywheel keys. They have a "W" cut into the flywheel and crankshaft. I suppose they could strip, but they do fit...
Give it 1 shot of ether. If she doesn't fire or backfire, you have no spark.
Have a fire extinguisher nearby in case she catches fire.
If she fires and runs for a few seconds, it is likely carburation is the problem.
Alot of those motors have the quickstart system. Every time the starter is activated the quickstart system kicks on for a few seconds. If the engine is cold, quickstart is supposed to stay on until the motor is warm. You might check the port temp sensor, as it is the one that controls the...
I was unable to find serial number DC133106. Serial numbers usually start with a single letter or no letter at all and just have numbers.
A serial number beginning with D or C would be a 3-cylinder 50HP model, 1990 or newer.
I presume you have the 4-cylinder model. The 4-cylinder models...
The tilt tube is simply a piece of threaded pipe. It is removeable, as are the two transom clamp brackets. PTTs changed over the years, so it is hard to know what you have.
If there are identical, I would expect that you would be able to swap the PTT units, without removing the top (or bottom) motor mounts. If not, the motors are not identical, and I would suggest you post some pictures.
Gee, I wish it were so. A lot of people think the earth is flat. Some that fly on airplanes. Luckily most of the people in the US are intelligent, reasonable, good people. I would hope the flat earth movement would be OBE.
You would be well served to follow Racerone's suggestion. Fixing a gearcase takes special tools and knowledge. It is best to make sure it needs it, and to price a SEI gearcase replacement.
Gee, what does the repower cost? Remanufactured I/O engines are pretty cheap. I/O engines should last 20 years if raw water cooled in salt water. The manifolds and risers rot out after 10 years or so.
Usually FWC systems on V engines cool the risers with raw water. If you are considering...
My neighbor has a Yammie 150 and hydraulic steering. Fluid is added to the helm, via a cap in the fiberglass dashboard, left of the steering wheel. Unscrew the cap, screw in the hydraulic fluid hose (like a gear lube pump hose), and then connect the hose to a qt of hydraulic fluid. It helps...
A high RPM at idle will prevent the motor from coming out of gear as well. She should idle at 900RPM or less.
Mercs usually have an idle stop setting on the throttle arm. When in neutral, the throttle should be pushed up against the throttle stop. You might check that and adjust the throttle...
MerCruiser impellers will cause overheat at idle, if the bottom of them is damaged. You state that you replace it every year, so I will assume that is not the issue. Do you replace the wear plate, and the two gaskets as well? If the wearplate has scratches or the gaskets leak, that can cause...
What do the top of the risers, under the rubber sleeve look like? That is usually an indicator of how much the manifolds and risers are corroded.
Picture 2 shows a lot more rust that I thought I would see, especially on a freshwater boat. Was she used in the salt, before you bought it? She...
This should be reposted in the MerCruiser forum. You might look for a wiring diagram for your motor. They should be available on the net. Although the starter wiring probably didn't change much or at all over the years, it would be best to get a diagram for the 3.0 as close to your year as...
Controls are not hard to put in. If you have ever changed a throttle or shift cable, you have already done it, or most of it.
Different engines use different spots within the control to attach the cables, so do not lose the instructions.
Both controls you cited should work. Make sure the...
