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Could be. I have a chart that shows the pop-off pressure for the 700 engine should be 30-40 PSI. Always good to put a drop of oil on the needle when performing the test to make sure that it doesn't...

I don't remember the color of the flappers. They can be tricky to install, wrap a piece of dental floss around the tit and pull it through the hole with that.

To test the fuel selector valve,...

The fuel filter normally doesn't get completely full. About half full is normal.

The carb looks much better inside than I expected. However, there is a little bit of corrosion on the fuel pump which might prevent the flapper valves from seating. As you mentioned, you may have a...

Any chance of renting a PWC when you get there?

It sat for 9 years. The flapper valves in the fuel pump are probably stuck, or worse. The diaphragm is probably dried up and split. The carb probably has gum and corrosion in it, and the internal...

Sounds like pump noise to me.

You can slide the driveshaft back and disengage it from the engine coupling and try it. Just make sure it can't more forward and hit the coupling. Perhaps wrap...

You can go to the Texas Parks & Wildlife website and get all the details. You will have to post a bond of 1.5 times the purchase price.

I went through a similar ordeal years ago when they changed...

While you're at it, upgrade the oil lines. Use polyurethane hose and secure them with Oetiker clamps or .025" stainless steel safety wire. The original hoses are too short and they get brittle and...

If it sat for 9 years without being used, the carb is dirty. Oil should drip into the carburetor throat.

I'm not familiar with the oil level gauge on that model. The oil line from the pump to...

44,000 posts and 98%+ are helpful, especially to new people. Bravo, K447!

Oil pressure sensor, it mounts above the oil filter.

Normally, the starter clutch is dry. I recommended soaking in oil because I figured that it was rusted and the clutch sprags weren't engaging.

Pre-mix should be 50:1.

There is one fuel...

Yes, you can run it without the driveshaft. Yes, you need a water hose. Do not turn on the water until the engine it running! Water can back up through the exhaust and get into the engine if you...

Welcome aboard, Vollste!

Great choice!

I would add a couple tips:

Flush it with fresh water after each outing if you ride in saltwater. When you run it on the hose, start the engine, THEN...

The one-way clutch is slipping. Try soaking it in penetrating oil for a day and see if that frees it up. It should hold in one direction and spin in the other direction.

Welcome aboard, cocacolaxyz!

What is the problem that you're trying to solve? Most likely you have trash in the carbs that needs to be cleaned out. Be certain to clean out the fuel rails,...

That makes sense.

Thanks for the correction!

Wash the engine down with solvent, such as mineral spirits or Varsol. Let it dry. Spray it with dye penetrant developer (actually, I think baby powder might work). Keep an eye on it and you may...

When you have an air leak, it runs very lean. Lean means that it's also running hot--hot enough to get the carbon particles inside the combustion chamber to glow. The glowing particles ignite the...

I've never seen the housing crack, but yes, you need to replace it.

Yes, you need to move the engine forward to service the intermediate bearing.

I doubt that you'd be able to get the chain wrench in there, it's a pretty tight space to work in. These pliers actually work:
...

Is the steering cable housing secured properly on both ends?

It's possible that you may have backed the trailer into something hit the steering nozzle, bending the end of the cable slightly.

It's not unusual for the driveshaft to get stuck in the intermediate bearing on the Yamahas. I've heard of cases where the driveshaft actually had to be cut with a saw to remove the jet pump. ...

Sounds like a plan!