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Old June 5th, 2012, 08:04 PM   #1
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Default *Sold* marine 350 magnum mercruiser rebuilt $1500

1989 Chevy 350 marine engine. Complete intake to oil pan. This engine was rebuilt with std pistons and bearings. The worst cylinder taper was .001" so they were honed and standard size pistons used. Crank was also in perfect condition and well within spec. All bearing clearances were checked on assembly. This engine was either 260 or 270 HP I don't have the boat anymore and the engine data plate went with it. It is a roller cam engine with the stock cam and lifters reused. It is rebuilt slightly better than stock using hypereutectic pistons and molly rings, all 16 valves have been replaced and the valve springs upgraded to handle the stock cam(under sprung stock) . For old school engine people marine engines haven't used forged parts in small blocks since the early 80s so these are upgrades.

Engine has not been repainted the factory paint was in pretty good shape and could use a touch up but it looks pretty good.

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Old June 5th, 2012, 08:33 PM   #2
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It has been run on a runstand. 40PSI oil pressure at idle w/190 water temp and 5w30 oil. Oil has been drained.
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Old June 6th, 2012, 11:49 AM   #3
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Default forged?

I believe those are cast pistons not forged.. glws seems like a decent deal.
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Old June 6th, 2012, 04:47 PM   #4
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Quote:
Originally Posted by bdavid View Post
I believe those are cast pistons not forged.. glws seems like a decent deal.
Thanks,

hypereutectic pistons are a type of cast that is an upgrade over the traditional cast pistons because of the material used. What I was getting at is marine small block engines have been using cast cranks and pistons since the early 80's. I pulled cast pistons out of this one and replaced them with hypereutectic which is a slight upgrade.
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Old June 6th, 2012, 04:50 PM   #5
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Also this engine will fit in any vehicle that takes a sbc but will more than likely need a different oil pan to clear cross members.
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Old June 6th, 2012, 04:53 PM   #6
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89 350 Mag should be a 270hp, the standard 350 was 260hp.

GLWS!

-Rob
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Old June 8th, 2012, 04:04 PM   #7
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Sale pending
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Old June 11th, 2012, 01:12 PM   #8
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