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Author Topic:   235 Conquest

gutsandglory posted 08-17-2006 09:55 PM ET (US)
With my Verado 250 @4425 rpm's I'm doing 24, 25 mph. Opened all the way, close to 6000 rpm's, 33-35 mph. Seems a little sluggtish to me. Anyone with this boat have any comments?
BarryGreen posted 08-18-2006 07:50 AM ET (US)
G&G -
My 235 Conquest with 250 Verado does 29+ mph at 4500 rpm and 41 mph at 6200 rpm, GPS numbers. This is with 2 people aboard, full fuel, and the usual load of anchors and other miscellaneous.
I'm running a 15" Rev 4 prop (not the prop Whaler provided initially) with no bottom paint in fresh water, but the above numbers were taken at the end of last season with a somewhat dirty bottom.
What are you running for a prop; I'd guess that's the problem.
Barry
bsmotril posted 08-18-2006 11:17 AM ET (US)
I would be suspect of any speed numbers coming from a source other than GPS. Speed from a pitot tube like the ones built into the Verado gearcase are notoriously inaccurate.
BillS
BarryGreen posted 08-18-2006 11:42 AM ET (US)
Bill -
In this case the "Verado" numbers come from a paddlewheel in Mercury SmartCraft System View (SC5000) rather than a pitot tube, but I do agree. At very slow speeds the Verado system may be a bit more accurate due to the tiny deltas available from GPS, but above trolling speed GPS is the only way of getting accurate speed numbers.
Barry
gutsandglory posted 08-18-2006 10:47 PM ET (US)
My figures were from the paddlewheel being my GPS unit was removed for repairs. I am determined to recheck with GPS.
As far as the bottom goes; my boat was bottom painted in May with an anti-fouling paint. The boat has sat in salt water this season, getting very lite usage. What kind of buildup on the hull should be expected, if any. Should I pull the boat to examine and/or clean the bottom?
nooner posted 08-27-2006 01:57 AM ET (US)
you can hire a diver to scrape/clean the bottom of your boat.
oroseiwhaler posted 08-27-2006 05:39 AM ET (US)
G&G,
if your bottom was painted with a good antifouling it will be cleen. If there is some buildup they used very cheap antifouling or you have your boat in very warm and barnacle infested water. Good antifoulings will least at least one year in a warm brackish water (the worst one, the best will least 2 years with some periodic polishing with the scotch brite pad.
Some small barnacles can be scraped off with a scotch brite pad using mask and snorkel. Using a scraper could risult in ugly scratches in to the antifouling and gelcoat. If you still will use a scraper, grind off the sharpe edges left and right of the blade, this will help to avoid scratches.
Anyway, only a thick layer of barnackles and mussels will slow down your boat like yours, so i guess theres something wrong with your mecanical speedometer.
Best regards
Chris

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Author	Topic: 235 Conquest
gutsandglory	posted 08-17-2006 09:55 PM ET (US) With my Verado 250 @4425 rpm's I'm doing 24, 25 mph. Opened all the way, close to 6000 rpm's, 33-35 mph. Seems a little sluggtish to me. Anyone with this boat have any comments?
BarryGreen	posted 08-18-2006 07:50 AM ET (US) G&G - My 235 Conquest with 250 Verado does 29+ mph at 4500 rpm and 41 mph at 6200 rpm, GPS numbers. This is with 2 people aboard, full fuel, and the usual load of anchors and other miscellaneous. I'm running a 15" Rev 4 prop (not the prop Whaler provided initially) with no bottom paint in fresh water, but the above numbers were taken at the end of last season with a somewhat dirty bottom. What are you running for a prop; I'd guess that's the problem. Barry
bsmotril	posted 08-18-2006 11:17 AM ET (US) I would be suspect of any speed numbers coming from a source other than GPS. Speed from a pitot tube like the ones built into the Verado gearcase are notoriously inaccurate. BillS
BarryGreen	posted 08-18-2006 11:42 AM ET (US) Bill - In this case the "Verado" numbers come from a paddlewheel in Mercury SmartCraft System View (SC5000) rather than a pitot tube, but I do agree. At very slow speeds the Verado system may be a bit more accurate due to the tiny deltas available from GPS, but above trolling speed GPS is the only way of getting accurate speed numbers. Barry
gutsandglory	posted 08-18-2006 10:47 PM ET (US) My figures were from the paddlewheel being my GPS unit was removed for repairs. I am determined to recheck with GPS. As far as the bottom goes; my boat was bottom painted in May with an anti-fouling paint. The boat has sat in salt water this season, getting very lite usage. What kind of buildup on the hull should be expected, if any. Should I pull the boat to examine and/or clean the bottom?
nooner	posted 08-27-2006 01:57 AM ET (US) you can hire a diver to scrape/clean the bottom of your boat.
oroseiwhaler	posted 08-27-2006 05:39 AM ET (US) G&G, if your bottom was painted with a good antifouling it will be cleen. If there is some buildup they used very cheap antifouling or you have your boat in very warm and barnacle infested water. Good antifoulings will least at least one year in a warm brackish water (the worst one, the best will least 2 years with some periodic polishing with the scotch brite pad. Some small barnacles can be scraped off with a scotch brite pad using mask and snorkel. Using a scraper could risult in ugly scratches in to the antifouling and gelcoat. If you still will use a scraper, grind off the sharpe edges left and right of the blade, this will help to avoid scratches. Anyway, only a thick layer of barnackles and mussels will slow down your boat like yours, so i guess theres something wrong with your mecanical speedometer. Best regards Chris