The question is wether the transom will support that motor's power. I have heard, but never saw that the transoms of the i/o boats were intentionally made weaker than O/B models of that year. If that is the case those jackplates will damage the transom.
Gee, it sounds like you need a service manual for that motor. Who knows what else is not to spec.
A service manual will have a wiring diagram for that motor, so you can get it right.
Is that motor supposed to have an electric fuel pump? Most motors of that vintage had carbs and mechanical...
Since the motor does not use any battery power to create spark, the blown fuse suggests a bad wiring harness or a short.
What is the condition of the wiring harness for the engine? A lot of them fail by now, if not replaced. Failing wiring harnesses can ruin the other igntion components.
If you have an ohmmeter you can check the sender, w/o seeing it. Disconnect the pink wire from the gauge. The pink wire should have some resistance to ground, say between 30 and 250 ohms, if it is good and connected properly.
However, I find that the senders are the first to go. The last...
Blisters are often caused by uncured resin in the hull mixing with water. I cannot tell from the photo what caused the damage you are seeing.
However, I have simple topside paint on the hull of my boat, and it sits on bunks on a lift, and I do not have any blisters in the paint, and gelcoat...
Generally, the modular props will fit most makes, with the correct hub kit and hub size. My V6 Johnson OB and V6 Mercury can share props, and that same prop will fit an Alpha 1 drive, with the correct modular hub.
So if the Yamaha prop has a 4-3/4 hub, it should fit a MerCruiser Alpha 1.
My speedboat sits on a lift with bunks all season. It has one-part polyurethane topside paint on the entire boat, however, I never had even one blister. I think it is a non-issue.
Antifouling paint on a trailered boat is not ideal, IMO. It will rob some speed, not look good and wrongly announce that the boat was kept in the water, which is bad for resale.
Yes, one part polyurethane paint is considered to be topside, but there are other topside paints which include enamel and other formulations. I believe polyurethane paint to be superior in shine and hardness to them. Their price is also higher.
Trailered boats do not need any paint on their bottoms. The gel coat from the factory is just fine. If you do not like the look of the gel coat, any marine polyurethane will make it nice and shiny, with the correct prep.
If you use a one-part polyurethane, the boat cannot be kept in the...
Gee, I do not see the bend. I did see some pictures of your shop, plus some others I cannot id. However, if there is a bend in the cable and the cable end will not pass thru the tilt tube, you need to cut it off and pull out the stub.
Jim, there are two kinds of poly resin. Laminating resin (no wax) stays tacky after it sets. Finishing resin (with wax) gets rock hard. You can gelcoat over either, but sanding the finish resin is recommended.
The gelcoat also comes in waxed and unwaxed. Unwaxed is used for the first coat...
Sure, It is easy with a remote control engine and a dashboard.
First buy a tachometer that is compatible with your engine. Install it into the dashboard.
Second, most remote controls have pigtails or a plug that will supply +12VDC, ground and tach signal. Hook those the the tachometer...