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You see a lot of the boats advertised with 150 on a 21. Is that adequate? They must only go like 28mph right....top speed. I'm not a speed guy, but wouldn't a 175 be more prudent? Anyone have a 150 on a 21 or experienced that in a positive or negative light?
 

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I have a 150 Yamaha on a 2120 Parker DSC 39mph top at 5200rpm Boat weight is 3700lb plus 105 gal gas 735 lb Gear etc? 4 adults at 4000rpm 22mph Plenty for me! has trim tabs. Very efficient 2mpg, Boat will take 225hp most are fitted with 200hp 4strokes or HPDI,I dont see the advantage unless you want enter an off shore race Parker claims the 2520 sc will do 52mph with the 200hpdi.
Merry christmas.Mike
 

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I have yamaha 150 salwater series hp on a 21" Triumph...More then enough power...it flys actually
 

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I am hearing down here in the summer calm seas are the norm.

Plenty of opportunities to open it up

Could be a window here for a bay fisherman to do some deep sea action !!!

Grouper/snapper and dolphin as close as 5 miles
 

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We did great last summer in the Gulf. Flat as glass and go like hell. The boat does 45 kts I think. Ran 30 miles to a radio tower one day.
 

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Originally posted by aimless2:
We did great last summer in the Gulf. Flat as glass and go like hell. The boat does 45 kts I think. Ran 30 miles to a radio tower one day.
Beware the afternoon thunder-boomer though huh??

Heard that can change things in a New York Minute
 

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Just got a brand new 150 V-tech Honda 4 stroke for my 19' cc and she seems over powered. Was thinking of looking for a 20-21' hull to better fit my outboard in the future! As for speed she flys...
loose
 

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I have a 21 DC Striper with a 175 Johnson and I am glad that I went with the 175 vs 150......

Its nice to have the extra power when you need it.
 

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Originally posted by DEEP POCKETS:
I have a 21 DC Striper with a 175 Johnson and I am glad that I went with the 175 vs 150......

Its nice to have the extra power when you need it.
Thats fine, if you've got DEEP POCKETS. And as long as you don't have short arms :D :D
 

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i have a 19ft striper w/a with a 150 johnson and she flys !!! 52mph on glass!!! if you want to go that fast get a speed boat!!!
 

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Underdog.....150 is fine.
Be sure to check the dry weight of the boat. For example, a 21' Grady is heavier than a 21' Sea Hunt.

BIGGEST....How do you like your Hunt? I have a '99 20 CC with a 150 Johnson. Great beam, but the hull is not "solid"

Sean
 

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I installed a F150 Yamaha on my 1979 Mako 21.
Talked to Yamaha before purchase and looked at specs on thier web site for different boats with both 150 and 200 four stroke power. the 150 is a 4 cylinder and weights about 138 pounds less then the 6 cylinder 200 hp unit. The power to weight ratio is amazingly close. the difference of time to get on plane is less then 2 seconds, top speed is 3-4 mph for most applications. my boat runs out at 38 mph @5500 rpm with a 16 pitch prop. I have a t-top with enclosure as well. I also enjoy much better economy with the 4 banger. the big difference is how the boat sits with an extra 138 pound hanging off the back end.If I were to put the 200 on my boat the scuppers would have to be raised to function properly. I formerly had a 200 johnson, which weight in about the same as the F150, Ido have to admit the 2 stroke was faster , but would not trade the $strokes quiet, dependable, economy for a few mph that I can only use occationaly.
 

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Originally posted by Two Timer:
I installed a F150 Yamaha on my 1979 Mako 21.
Talked to Yamaha before purchase and looked at specs on thier web site for different boats with both 150 and 200 four stroke power. the 150 is a 4 cylinder and weights about 138 pounds less then the 6 cylinder 200 hp unit. The power to weight ratio is amazingly close. the difference of time to get on plane is less then 2 seconds, top speed is 3-4 mph for most applications. my boat runs out at 38 mph @5500 rpm with a 16 pitch prop. I have a t-top with enclosure as well. I also enjoy much better economy with the 4 banger. the big difference is how the boat sits with an extra 138 pound hanging off the back end.If I were to put the 200 on my boat the scuppers would have to be raised to function properly. I formerly had a 200 johnson, which weight in about the same as the F150, Ido have to admit the 2 stroke was faster , but would not trade the $strokes quiet, dependable, economy for a few mph that I can only use occationaly.
Thanks for the info

I am wet in about 1 week with a 4 stroke 150 on a 210 Cobia WA

[ 12-28-2004, 07:10 AM: Message edited by: Dr. Bass ]
 
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