V8 305 Mercruiser Engine ID

TheHunter990

Seaman Apprentice
Joined
May 27, 2012
Messages
41
Hi, can you help me ID this motor:

Serial A570518 on Rocker cover
Serial 0B559861 on gimbal housing or engine starter
Engine block casting is 14093627

I think it is a 88 Mercruiser 305, 1 pc rear main seal, roller cam, 4 bbl carb.

I'd love to know what is it for sure. Have some upgrades in mind.

Thanks.

Edit: For what it's worth the Hull ID ends in L586 (Dec 5, 1986?)
 
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Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,093
Re: V8 305 Mercruiser Engine ID

11905 - 230 HP/260 H.P. Inboard Engine (GM) 1986
Service Literature for MERCRUISER MC1 1.98:1



PARTS CATALOGS
• 99964 - R/MR ALPHA ONE STERNDRIVE
A v8 and a 1.98 gear ratio is wrong
 
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Fun Times

Moderator
Staff member
Joined
May 16, 2009
Messages
8,776
Re: V8 305 Mercruiser Engine ID

MERCRUISER - (230 H.P. (1986)
Serial No: 0A570518 Model No: 02302346 Parts Catalog part No: 11905

MERCRUISER - (MC1 - (1987) 1.98:1
Serial No: 0B559861 Model No: 01981017 Parts Catalog No: 99964
 
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