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Old 09-09-2010, 08:56 AM
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Default 305 0r 350
mercruiser small block, how can I tell which motor is in the boat, 305 or 350
Last edited by captain girt; 09-09-2010 at 09:00 AM.
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Old 09-09-2010, 09:30 AM
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Is there a serial number or horsepower rating on it anywhere?
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Old 09-09-2010, 09:51 AM
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Look for the casting numbers on the block.
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Old 09-10-2010, 06:08 AM
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most will have a fairly large 5.0 or 5.7 outcast on the block
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Old 09-10-2010, 06:33 AM
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usually looking down at the back of the block, I dont see it
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Old 09-10-2010, 06:40 AM
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If you can get the casting number of the head that might lead you in the right direction also. The 305s I have worked on had a smaller chamber heads. Several people used the 305 heads on stock car engines to raise the compression.
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Old 09-11-2010, 08:22 AM
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try looking on the block area on top at bellhousing area behind dist.
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