Challenge: How do you solve this?

[David M]

Agreed, anyone can throw out a question. Yes, lets hear some mechanical or electrical questions. I bet Chief Engineer, Never Monday or some of you other "gearheads" could come up with some good ones.

OK, here is one for you.
Cutter rig. You sail down the main channel with the wind to starboard, turn down wind for about a hundred feet, turn to Starboard for about a hundred feet, then turn to starboard into an upwind slip. Short handed. What sails do you take down, and when? (No engine) Just to add, wind is about 15kts

[David M]

Not knowing cutter rigs very well, let me take a stab at it. You drop all your sails except for the main. You turn the boat upwind about two or three boat lengths away from the slip. The turning of the boat kills off some boat speed and the large luffing main acts somewhat as a brake. I'm probably wrong but that's my best guess.

Right on the money. Jib and staysail drop in the channel. Main stays up to maintain control, and drive. Once in the slip, the main can be backwinded to stop the boat. Generally, no need to turn upwind before the slip in this wind speed, but this is a good option if you gage the speed wrong on approach.
Guess that was an easy one.
Here is another one. Perkins 4-107. Engine is running well, but seems to heat up at idle, and under load. Cooling water is exiting the boat, but seems in less volume, but more pressure. Intake strainer is clear, and water can be seen flowing. Intake thu hull is clear.

[David M]

Raw water impeller is going bad? Got some rust in the engine riser partially clogging it? Something partially blocking the exhaust like a stuck flapper valve? Seacock is not all the way open? Suction leak between the strainer and the raw water pump?

I guess I can pick only one answer. Since you said less water volume but more pressure at the exhaust outlet, I'm going to guess a partially stuck flapper valve. Much the same effect as putting your thumb over the end of a garden hose.

Lets hear from some others first.

I will tell you it was not in the pump and there is no flapper valve.

[svHyLyte]

Obstructed mixing valve.

Good try, but nope. Think simple. The repair required no tools.

[Pelagic]

Simple and No tools....hmmmmm!!

Have you checked the level of fresh water in the header tank?

Fresh water level is good. I will add that the flapper valve idea was the closest.

[sluissa]

partially closed seacock?

Nope, but close. You have identified the problem. Now identify the cause.

[Pelagic]

You said the thru hull was clear so I didn't suggest a plastic bag partially blocking the intake

Nothing inside the system.

[Pelagic]

Originally Posted by Kai Nui

Nothing inside the system.

I meant on the outside of the hull