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I recently replaced one of my 1991 Hatteras 52 CMY 8V92TA Covington heat exchangers. It had developed a leak on one end near the lower pipe attachment point. I repaired with J-B Weld. If anyone wants the HE it is available. It is quite heavy so shipping will be expensive (new one was shipped...

Good afternoon, 1991 Hatteras 52 CMY, 8V92TA, 2200 hours, coolant changed 100 hours prior, oil/filter changed 100 hours prior, uses ~ one gallon DELO 100 40 every 75 hours, little/no smoke on start or run. Completed a short cruise yesterday. Run time was 2.2 hours at 1100-1850 RPM to home...

We arrived at Coinjock Marina the previous afternoon. Enjoyed meeting a couple who had recently purchased a 48 CMY in Charleston and were relocating her to the Chesapeake Bay. Our plan was for an early launch the next morning knowing we had numerous bridges and the Great Bridge Lock to tackle...

Underway yesterday en route to boatyard for bottom paint and engine seaflange replacement. Everything was going well until one hour into the trip. I noticed that the heading vector on all Garmin displays was indicating 10-15 degrees right of course. My disassociated Tablet displayed a...

My old Onan MDL4 fuel transfer pump has sprung a leak. I'm not having any luck locating a replacement. It was suggested to me to purchase a 24V Facet fuel pump to plumb into the system. There appear to be pumps on the Facet website that meet the criteria for PSI and voltage. I'm wondering if...

Good afternoon, The Onan MDL4 Genset on my 1991 Hatteras 52 CMY sprung a leak at the pulley on the coolant pump. Parts manual indicates a Repair Kit - Coolant Pump part number 541-0214-02 that includes gaskets, seal, hub, bearing, impeller and backplate mounting screws. Believe I also need...

I'm looking into installing a mechanical water temperature gauge (in the ER) on my 8V92TAs. I would appreciate advice on where to insert the temperature probe on the engine. Pictures would be very helpful.

Greetings from eastern NC. I'm trying to determine ground truth on use of zincs in the raw water pump on my 8V92TAs. I've read that some don't put a zinc on the input side (concerned that it could break off and damage the pump), some don't put a zinc on input or output side, and some put in...

Good afternoon, I'm about to tackle my first 8V92TA and transmission (Twin Disc DD 5111V) oil/filter change on my still new to me 1991 Hatteras 52 CMY. The engines appear to be straight-forward using the oil change pump installed. The transmissions are a bit more challenging. There is not a...

1991 Hatteras 52 CMY. Four fuel tanks (forward, mid, aft, cockpit). Previous owner installed new VDO (Viewline Ivory 0-1/1 - 12/24V) gauges on the flybridge. Original tank gauges installed at the lower helm. None of the tank senders were updated. I believe they are Centroid senders. The...

Hatteras 52 CMY with 8V92TAs. Starboard engine ignition switch in "on" position does not activate the buzzer at the fly bridge helm or the lower helm. I'm guessing it is not the buzzer since neither one activates but possibly could be two bad buzzers. Port engine works ok at both helm...

I have a 1991 Hatteras 52 CMY with 8V92TA engines. I'm trying to identify a sensor/sending unit and its function. My port engine has a sensor/sending unit on the metal duct just forward of one of the turbos that has 4 wires connected to it. The starboard engine has an oval shaped access in...

I need to replace the blackwater hose between the vacuflush pump and the Y-valve. I'm not familiar with this system just yet so I wanted to ask if there are any precautions I need to take. I'll turn the pump off before removing hose fittings...will there be any pressure in the system that may...

Earlier today I asked a question about shore power cables and then realized I had jumped into the forum without properly introducing myself. I'm the owner of a "new to me" 1991 Hatteras 52 CMY that will soon be renamed TANGO. I acquired her in the Hampton Roads area and just brought her down...

I need to replace the shore power cord on a 1991 Hatteras 52 CMY. I believe the current cord is original to the vessel and is very stiff and cracked. In fact, it is so stiff that it does not fully retract via the Glendinning Cablemaster (CM-7). I spoke with Glendenning rep and he said they...