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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Gas > Atomic 4
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  #11  
Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

I did a quick look in soldboats.com. It looks like your boat with a gas engine sells for about $20k here in Ontario while with a diesel gets close to $25k. So it looks like you'd get about half your money back (in todays market).
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  #12  
Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Have the A4 professionally rebuilt and professionally installed. Replace all the extras: alternator, starter, cooling stuff while you are at it. $6,600 is on the plane of chump change for re-powering a34 foot boat. Going to a new diesel would be three times that amount. I do not think you would get back even half of a diesel repower, but would get back most of the A4 repower (its just not much money...).
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  #13  
Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

How about this one on fleabay? should drop in using your existing mounts etc.
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Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

I gotta admit that I find the market rate for atomic 4 rebuilds stunning.
It's a tractor engine. pushrods, single carb, side valve, flathead, mechanical distributor.
if it was any simpler it wouldn't run.
i think a competent mechanic would be hard pressed to put more than 10 hours into a teardown and rebuild, while an amateur fumbling through his first one might invest twice that in total manhours on the tools.

From a parts standpoint, using moyer pricing, 4 con rods, $300, new crankshaft $400, new pistons (overbored) $300, new bearings (big and little) $400, new valves etc. $400, flywheel is $75, now you have a whole brand spankig new rotating assembly and valve train. Add a $100 gasket kit and $50 worth of hardware and you've just rebuilt the engine. add a few hundred bucks to machine 4 cylinders and clean up the block and head and you're still well under $3K. add a new carb for $200.
You now have damn near a fully rebuilt engine. In other words much more work than in your quote.
For $3K.
at $100/hr for labour, (a stunning figure, considering that a high school shop class would be hard pressed to screw up an atomic 4 rebuild- this does't require a master tech with a 24 drawer roller cabinet full of tools.) there's 35 hours of labour to get to your quote.

There's no way a 4 cylinder sidevalve engine needs that much labour for a professional to strip and rebuild.

And there's no reason why an average person who can turn a wrench or a screwdriver can't do it himself.
think about how many hours it takes to earn the money to pay the guy fixing your engine. why not put those hours toward doing it yourself?
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Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Chris, 10 years ago our A4 died. Went to a local shop. They happen to have a rebuilt A4 on hand (they supported a charter business). Removal of our old A4, and install of this "new" one cost us about $2,000.

This was a decade ago, and the engine has already been rebuilt, so not directly comparable to your situation, but still ... $6,600 sound like a lot to me.
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Old 02-13-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Yeah! $6600 for just the rebuild, plus re-install yet; sounds like he's tryin' ta sell ya a new motor (or a bill of goods !). $4600-4900 for the MMI and IIRC, ya get a core chg back? I had a large Onan 4 cyl genset rebuilt a coupe years ago to near the same extent and it was only $1100 ! And Onan charges near Harley prices for parts!
Conversely; find a solid used A-4 ..I've seen some in the 1200-1700 dollar range...and have a pro go over it. Tweak as needed and yer into less than $2500. Pop it back in yerself and it's all good
While I'd opt for a diesel; the change over costs would be prohibitive, so stick w/gas and go, go...go !
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Old 02-14-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

I'm not sure where you are located but here is a used A4 for sale that would do the trick for you: Atomic 4 engine
Saw this on another thread in the A4 section.
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Old 02-14-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Atomic 4 engine for sale. $2500 Atomic 4 engine
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

I am not sure where you are located but I would look for a place that does agricultural or industrial tractor motor repairs, away from the boat yards.
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Old 02-15-2013
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Re: $6,600 to rebuild Atomic 4? replace/rebuild

Sounds like a "marine premium" to me as well. Have them break out just the engine work from the quote and get your own engine, I have to assume that the $66oo quote includes turn key re-install.
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atomic 4 , atomic 4 engine , c&c , diesel swap , engine rebuild

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