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#1
05-27-2016, 07:33 AM
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20 CC WOT numbers
Hello, I have 1973 20CC with a 1998 225 EFI Merc. Put the boat in yesterday after installing a new garmin gps. The problem is, with 4 adults and 40 gallons of fuel i was only getting 48-49 miles an hour. The question i have is anyone running same boat with similar power and what numbers are you getting and full throttle? compression test today. thanks
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#3
05-27-2016, 04:23 PM
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yeah i know that sounds bad but but 10-12 years ago she ran upper 60's with me and one guy on board with a handheld gps. I never had gps on the boat until I installed one this spring. Compression test today showed why, all 6 cylinders were low 90's.
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#4
06-03-2016, 10:51 PM
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I had an '86 20' with a 225 Optimax and it was a 54mph boat. I saw 56 a few times, but never more. Based on that, id say you're in line.
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#5
06-04-2016, 07:43 AM
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Quote:
all cylinder reading the same number ?
__________________
do not let common sense get in your way
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#6
06-04-2016, 09:58 AM
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Check the cavitation plate make sure it's 1.5" above the bottom v. For what it's worth, I just put on a Merc 225 3.0L carb motor on my 23 WOT bounced b/w 49.3mph and 48.6.
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