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2007 Checkmate 230 ZT Speed & RPM

Old 08-20-2013, 09:40 AM
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Default 2007 Checkmate 230 ZT Speed & RPM

I have just purchased a 2007 Checkmate 230 ZT with a 500 HP merc racing engine and a HP Imco 1 in shortened lower unit with a 30 in. pitch prop. Can't get past 4,200 RPM and 60 MPH. Need help. Was told that the boat would 100 MPH which I doubted but I thought it should do maybe 75 or so.
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Old 08-20-2013, 12:33 PM
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Absolutely one of the silliest first posts ever! Seriously Dude?
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Old 08-20-2013, 06:43 PM
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Thanks for the input. Your nose must be stuck up in the clouds.
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Old 08-21-2013, 07:48 AM
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OK I'll bite...Did you go for a test drive with your new boat? Who did you buy it from? Please post some pics so we can see your new beast. I would get in touch with the previous owner/person who sold you the boat and verify the advertised speed. 23foot checkmate boats with 500hp don't go 100mph.
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Old 08-21-2013, 08:08 AM
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It'll never go even near 100 with the 500, but 30 pitch is too much, try stepping the prop back to at least a 26 and you should pick up the rpm and some speed.
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Old 08-21-2013, 02:18 PM
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23 zt? or 24?

first off im 99% sure the short drive is going to kill you on that boat.
from what i have seen the newer zt hull 24 or 26 do not do well with 3 blade props or short drives.
i would say go to a stock lower and a 26p prob and try again.
as for 100, no way. 75 maybe
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Old 08-21-2013, 03:53 PM
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Is this the boat you bought?

http://boats.smartcarguide.com/listing/30646928/
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Old 08-22-2013, 10:08 AM
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Noyzee, I tried a four blade 26P prop and picked up 1,000 RPM and 11 MPH top end she'll now do 71.1 on GPS at 5,200 RPM
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Old 08-22-2013, 10:14 AM
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GeeterB I Tried a 4 blade 26P prop over the 30P prop and picked up 1,000 RPM and 11 MPH om the top end. She'll now do 71.1 on GPS at 5,200 RPM
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Old 08-22-2013, 11:28 AM
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rchevelle71 I tried what what you suggested and what a difference. A 1,000 RPM gain and 11 MPH increase on top end. 71.1 0n GPS at 5,200 RPM
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