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I thought the petcoks ont he bottom of my air box derain cans was defective until I removed the "crap can" and discovered tht it had rotted away at the bottom and was leaking. It looks like a heavy duty oil filter and mounts tothe adapter via a bolt on top. I have one can for each 8V71N engine...

I have a commins-Onan MDL3 15Kw generator on my 1970 53MY. Lately, it has become very hard to start, requiring far too much cranking before firing up. Once started it runs just fine. Before burning up a starter motor, I'd like to resolve the real problem. My gut tells me that the recent drop...

I have a Cummins-Onan 15Kw generator onboard my 1970 53 Motoryacht. A couple weeks ago it simply shutdown while running within normal specs (at least I noticed nothing unusual). I traced the problem back to the High Temperature Automatic Shutdown switch which seems to have failed. It's been a...

I have a 1970 53 MY with DD 8V71Ns. My question is about instrumentation, specifically tachometers and whether or not the RPM reading can be adjusted. My port tach on the salon console clearly registrers 100-300 RPMs low compared to the one on the flybridge, dependant on engine speed. At idle...

With Tropical Storm Fay approaching the Keys, I'm curious what folks in that area do for the safety of themselves and their Hatteras investments. Although we don't get too much weather like that up here on the Chesapeake Bay, it isn't unheard of. My marina is not capable of pulling my boat and...

After 31 years in the Navy, I am a fanatic about having dry bilges. For a year and a half, I have wondered why I intermittently got water in the forward bilge area of my 1970 53 CMY. After 18 months of using the shop vac to suck the water out of the bilges the light bulb, albeit dimly, came on...

I am admittedly NOT an electronics guy, but this should not be so hard. I have a RAYSTAR 120 GPS receiver (SeaTalk version). It is interfaced via a Raymarine E85001 Interface unit to a Cetrek ProPilot 700 autopilot, a Furuno radar and a USB cable to my laptop (w/ MapTech chart software). That...

Had a nice run up to Baltimore for the weekend, with one notable exception. Several times on the way up and again on the way home, the stbd transmission drive oil pressure dropped to zero and the transmission disengaged. Found that if I dropped the RPMs to idle and put the transmissionlever...

Looking for an evaporator assembly compatible with a 15k BTU Cruisair unit. My aft salon unit for a 1970 53MY has died. In a pinch, I could just replace the blower, but it sure would be easier to change out the whole thing if I can find one reasonably priced.

I'm almost reluctant to post this as my problem seems to be a very common one that has been described on this forum in great detail. However, I've tried the common solutions without success and am stumped. The port engine on my 1970 53MY (8V71Ns) must have air leak in the fuel system. Once...

Took a look under the flybridge for the first time and was surprised/shocked at the condition of the wiring/terminal blocks/mounts under there. It is a tangled mess of spaghetti and rotted wood. Have decided to re-do the whole thing. Have purchased the 30A terminal blocks and built up a...

So, after the starboard engine starter went bad (4000+ hours on engine), I followed the advice on this forum and got her pulled out yesterday. It was a lot like a professional wrestling match (Little Jeff Vs. Big Dumb Metal), but in the end the starter is now in the shop for rebuild. Best...

I've got a 1970 53MY that is in need of some hand rail repairs. 12 of the stanchion bases are either badly ovalized or cracked, making the handrail a bit wobbly in places. Anybody have or know where I can get some stanchion bases that at least look original? I think Sam's only has the angled...

Everything was fine this morning...I headed down to the boat to change the fuel filters before setting off on a 3-4 day cruise on Chesapeake Bay with the First Mate (i.e. wife). Had been experiencing engine slowdowns, so filter change was indicated. Did the job on both 8V71Ns in about half an...

Got underway yesterday having done all my pre-start up checks (including transmission oil level checks). Engines had been idling for 20-30 minutes prior to casting off. Ten minutes after getting underway I noticed I had no starboard shaft power even though the engine was running and the...

On my 1970 53MY all four A/C plants seem to run just fine from the engineroom perspective. Compressors are great, raw water flow is fine, etc. However, on the aft salon fan coil unit the squirrel cage fan usually needs a push (physically) to get it rolling. Then, it runs fine for 10-20...

Long ago, a PO of my 1970 53 MY replaced the original wooden closet doors in the master stateroom with some ugly bifold mirrors. I'd really like to find some of the original style louvred/vented wood doors to put back on there. Anybody got some for sale or know where to get them? I know I...

Given the number of technical experts here, I'm certain that there are lots of folks who have done their own oil changes on the DD engines. As a first time "new" boat owner (1970 53CMY) I'm determined to do as much of the maintenance work as possible. I have an oil change unit (i.e. 5 gallon...

After a winter of tinkering with my "new" 1970 53 MY (8V71s), discovered that I have a few cooling system problems. Despite both engines doing fine prior to winterizing, I finally turned the keys, fired up the engines today and noted my starboard engine has a couple of cooling system issues...