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  Topic Review (Newest First)
2 Weeks Ago 12:03 PM
travlin-easy
Re: $6,600 to rebuild Atomic 4? replace/rebuild

If I had a choice from the jump....I choose the Yanmar. Let's face it....something to be said about not worrying about fumes blowing us up


In reality, the chances of blowing up because you have a gasoline engine onboard is probably less than blowing up because you have a propane stove onboard. Keep in mind that 99 percent of all the recreational boats in the US are gasoline powered, and most of the explosions take place as the result of doing something stupid while refueling, such as leaving the engine running, or not turning on the bilge blower before restarting the engine. According to the last boat US report I read about marina fires, they were the result of an electrical problem, or someone placing a heater onboard in a bad location.

Now, I was watching Deadliest Catch on the Discover channel a few months ago and one of the boats experienced a cracked fuel injector line, which triggered the explosive gas alarm. The diesel fumes were so thick that the mechanic had to wear a respirator and hazmat suit in order to get to the shut off valve and facilitate the repairs. They also had to use a special, sparkless fan to evacuate the fumes from the engine room. Fires aboard diesel-powered commercial fishing boats are not at all uncommon, and there have been many resultant explosions.

Another source of boat explosions is the result of shorted batteries that are on chargers or being charged while underway with the alternator. I experienced this first hand while fishing at the Marquesses Keys many years ago. At the time, I owned an 18-foot Starcraft Mariner, center console fishing boat powered with a 75 HP Johnson outboard. The battery was housed in a compartment beneath the transom well and accessed via a sliding door. That was also where all the electrical connections were made on an open terminal block and the relay for the power tilt and trim was housed. Apparently, the battery developed a shorted cell, thus causing the alternator to overcharge the remaining cells and produce a large quantity of explosive gasses. The explosion occurred when I activated the power trim as I entered the flats near Boca Grande Key. The blast blew the sliding door completely off the transom, sounded like a grenade going off and scared the hell out of the other two anglers in the boat as well as myself. Fortunately, we were in the company of another boat that had a spare battery that allowed up to clean the boat up and get back to Key West.

For many years, I've written about and advocated an automatic bilge blower than must be activated for at least three minutes before the ignition switch can become operable - just makes sense. I have also been a big proponent of constant ventilation in the battery compartment when the batteries are under charge, either at the dock or while underway.

Good luck,

Gary
3 Weeks Ago 09:29 PM
Capt Len
Re: $6,600 to rebuild Atomic 4? replace/rebuild

So, 7 pages and nobody has mentioned anything about stelite and installing new seats in old engine. Not the usual back yard job so figure the expense in proper rebuilding
3 Weeks Ago 09:02 PM
chef2sail
Re: $6,600 to rebuild Atomic 4? replace/rebuild

Quote:
Originally Posted by travlin-easy View Post
My A4 was rebuilt by Moyer in 2001, still runs like a Swiss watch, so quiet that most folks cannot hear the engine when we are down to idle speeds. And, not only is gasoline significantly less expensive than diesel in this part of the country, but less dirt. My diesel friends change fuel filters several times a year and those filters are nearly plugged each time. I changed my gas filter three years ago and while I carry three spares onboard, I think I will likely get another three years out of the filter before it needs changing. Plus 1 on Moyer's rebuilds! They do a great job and the prices, while high, are not nearly as high as a similar size diesel rebuild.

Now, one thing that every A4 user should know. There is a product out there called Marvel Mystery Oil, which keeps these old engines running forever and really works well in reducing wear and improving valve seating. I know there are skeptics on this site when it comes to this product, but those of us that are A4 owners and users swear by this stuff, and so does the folks at Moyer Marine. You will find the product at most auto parts stores in the US.

Good luck,

Gary
I had an A4 for many years on my first boat , an Islander 28. Was a great engine , reliable , easy to fix. Moyer was a great resource. As Gary said...champion of gas engines. I certainly had a love relationship with my old one.

So we have had for many years now had a Yanmar Diesel. It's the little engine that could. Clean fuel, easy to change the filters, easy to work on, no smell. Great mileage Very reliable. Mac Boring also a good resource.

If I had a choice from the jump....I choose the Yanmar. Let's face it....something to be said about not worrying about fumes blowing us up
3 Weeks Ago 09:03 PM
travlin-easy
Re: $6,600 to rebuild Atomic 4? replace/rebuild

My A4 was rebuilt by Moyer in 2001, still runs like a Swiss watch, so quiet that most folks cannot hear the engine when we are down to idle speeds. And, not only is gasoline significantly less expensive than diesel in this part of the country, but less dirt. My diesel friends change fuel filters several times a year and those filters are nearly plugged each time. I changed my gas filter three years ago and while I carry three spares onboard, I think I will likely get another three years out of the filter before it needs changing. Plus 1 on Moyer's rebuilds! They do a great job and the prices, while high, are not nearly as high as a similar size diesel rebuild.

Now, one thing that every A4 user should know. There is a product out there called Marvel Mystery Oil, which keeps these old engines running forever and really works well in reducing wear and improving valve seating. I know there are skeptics on this site when it comes to this product, but those of us that are A4 owners and users swear by this stuff, and so does the folks at Moyer Marine. You will find the product at most auto parts stores in the US.


Good luck,

Gary
3 Weeks Ago 06:58 PM
hransom
Re: $6,600 to rebuild Atomic 4? replace/rebuild

I have a great A4 for sail,,oil seals and bearing replaced 300 hour ago, I am changing the boat to diesel {got 1 for free} at this time I am changing out hoses and toching up paint. Call henry at 860-836-9797 if interested
08-15-2014 07:40 PM
catadmire
Re: $6,600 to rebuild Atomic 4? replace/rebuild

Mark: I have installed rebuilt Atomic IV in Catalina 30, but took the cable connection apart on port side to lubricate large tranny cable. Lost my photo on this assembly so do you or anyone have a photo of cable connection at cockpit control lever which is inside port lazarette??? Would be so grateful for photo or diagram.
07-28-2014 08:25 AM
downeast450
Re: $6,600 to rebuild Atomic 4? replace/rebuild

We did the same thing for the same reasons! Love the Moyer exchange. A sweet engine.

Down
07-14-2014 11:34 PM
christian.hess
Re: $6,600 to rebuild Atomic 4? replace/rebuild

its a deal when you get that back...a no brainer!

congrats
07-14-2014 10:56 PM
SloopDogg
Re: $6,600 to rebuild Atomic 4? replace/rebuild

Yea the $4k went to Moyer. The thing that sold me on the exchange engine was that it was painfully obvious that my engine was horribly neglected and the Moyer engine came with all the updates. It came with electronic ignition, the electric fuel pump, the oil changing kit, the furled extensions on the water pump cover, just about every upgrade they offer on the site comes on the exchange engine. Not only that, I got a new starter, new carburetor with all its little extras. Add that up on the site and the deal gets even better!

I removed the engine myself and got it out into the cockpit and had the yard take that down and place the new engine onto the motor mounts. They charged me $50! So, it was really a nice engine swap and a refresh on the engine room. after seeing the mess in the thermostat housing, the Fresh Water cooling kit from Indigo was a no brainer. I also threw the external thermostat housing and she runs a very nice 175 to 180 degrees!

I have to say, Yesterday was the best this engine has ever run. i installed the Indigo prop. I gain a little drag but the engine really likes the prop! It was a great day on the Viking!!! 15 knots of wind 6-7 knots thru the water on just the head sail! We had some issues that delayed the beginning of our season so it was our first time out this year. Great great day!
07-14-2014 09:15 PM
christian.hess
Re: $6,600 to rebuild Atomic 4? replace/rebuild

me too on an islander 34

breeze to work on...
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