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21-04-2016, 09:39 PM
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#1
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Evinrude etec Ho engine height. Maybe p1. Ss
Wondering what is a good starting point for my 250ho etec in terms of height. Anyone know how high they sit on the p1 super stocks for example?
Thanks gt
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22-04-2016, 10:54 AM
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#2
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Registered User
Country: Guernsey
Occupation: Postie
Interests: Heavy Heavy Metal
Boat name: Slayer II, Slayer, Pen15
Boat make: Phantom 19G-R, Bernico F2 Extreme, Ring 15
Engines: Evinrude 115HO, Yam 90
Cruising area: Channel Islands
Join Date: Aug 2009
Posts: 1,460
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What gearcase do you have? You'll be restricted on height by the stock pickups. Is your hull stepped or Unstepped?
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23-04-2016, 05:22 PM
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#3
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Hi Paul
It's the Lightning gear case on 250ho 2008.
Twin stepped hull, I don't know how high it was before as transom been done. But she did cavitate when trying to plane.
Speed was 71mph with 26 raker 700rpm down. It will be on a 6 inch offset bracket and manual lifter
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01-06-2016, 11:15 AM
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#4
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Ok so the offset bracket won't work as front mount steering hits transom even with a small amount of tilt. I'd have to raise it along way to clear. Gonna bolt it straight on back of boat. It is a lightning 2 gearbox. In the lowest hole the prop is gonna be about 2-3" below pad.
So will I get enough water? Looking at old pictures the engine will be roughly where it was, but centre on boat now as it was offset an inch or two starboard. . I have not cut transom down when I replaced it, and I have fitted an outboard well too. Transom actually measures 24.5" and engine is long shaft. Originally the engine would get a bit warm at river speeds and a quick blast would cool her down before the alarm went off.
Two options. Evinrude do big water scoops, anyone tried them? Or a bobs nose cone? Will either slow it down?
Thanks
GT
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01-06-2016, 01:08 PM
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#5
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Registered User
Country: Guernsey
Occupation: Postie
Interests: Heavy Heavy Metal
Boat name: Slayer II, Slayer, Pen15
Boat make: Phantom 19G-R, Bernico F2 Extreme, Ring 15
Engines: Evinrude 115HO, Yam 90
Cruising area: Channel Islands
Join Date: Aug 2009
Posts: 1,460
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If it were me I'd go for a Bob's cone. I used a set of the larger scoops briefly with my 200HO on a big bracket on a Ring 21 and they didn't like going high, I'd get an almost instant overheat alarm. The Bob's cone slowing you down is a myth I'm sure. Maybe at the same height as a stock case they're slower, but the speed gains from going up on a stepped hull that doesn't need a lot of bow lift will more than compensate
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01-06-2016, 11:04 PM
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#6
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Thanks Paul for feedback
I've emailed bobs about prices and shipping. If the big scoops didn't help you with setback fhey probably won't me too. if I can get some cheap or 2nd hand I might try them
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02-06-2016, 03:15 AM
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#7
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Registered User
Country: gibraltar/spain
Location: gibraltar
Boat name: sexy girl
Boat make: phantom 25/ring ranger 25
Engines: evinrude 250 ho
Cruising area: costa del sol
Join Date: Feb 2015
Location: gibraltar
Posts: 94
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hi guys could do with some feedback aswell,,,,,
i own a ring ranger 25,,,,,i am about to mount a 250 ho evinrude 25" on the back of a ring ranger 25 with a 28" transom height......
will i get away with a 3 inch difference?
i know that lots of phantom 25 down here in spain had 25" transom with 20" motor on the back......
any feedback or comment would be appreciated
cheers guys
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02-06-2016, 12:52 PM
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#8
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Registered User
Country: Guernsey
Occupation: Postie
Interests: Heavy Heavy Metal
Boat name: Slayer II, Slayer, Pen15
Boat make: Phantom 19G-R, Bernico F2 Extreme, Ring 15
Engines: Evinrude 115HO, Yam 90
Cruising area: Channel Islands
Join Date: Aug 2009
Posts: 1,460
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Quote:
Originally Posted by glen76
Thanks Paul for feedback
I've emailed bobs about prices and shipping. If the big scoops didn't help you with setback fhey probably won't me too. if I can get some cheap or 2nd hand I might try them
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No problem. I think Steel Developments stock the Bob's Cones
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24-06-2016, 08:58 PM
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#9
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Quote:
Originally Posted by nickypob
i don,t know anymore about the boat must be the same boat as was on ebay for sale the guy told me it had been sat for a long time and he needed to sell it to recoup storage costs at the boat yard
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The rib? Unlikely. I owned it since 2011
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16-12-2016, 05:13 PM
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#10
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Registered User
Boat name: P21
Boat make: P21
Engines: Evinrude 250 HO
Cruising area: Solent
Join Date: Jul 2015
Posts: 92
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My p21 runs a 250 HO L2 gearbox at 25.5 inch height. It cools perfectly. One notch higher and it overheats. D
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17-12-2016, 12:17 PM
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#11
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Registered User
Country: england
Location: southampton
Occupation: engineer
Interests: lots
Boat make: scorpion 8.1
Engines: 250HO
Cruising area: solent
Join Date: Mar 2004
Location: southampton
Posts: 1,353
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Quote:
Originally Posted by Fantom2
My p21 runs a 250 HO L2 gearbox at 25.5 inch height. It cools perfectly. One notch higher and it overheats. D
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How high is bullet to hull?
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28-12-2016, 04:02 PM
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#12
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Registered User
Boat name: P21
Boat make: P21
Engines: Evinrude 250 HO
Cruising area: Solent
Join Date: Jul 2015
Posts: 92
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Props shaft is about 2.5 inches below the hull line . Any higher and it starts to overheat on my L2 gearbox. I am going to put a water pickup on the transom and feed water direct to water pump, don't like the look of Bobs noses. They always seam to crack up in time and I don't want to weld one to my box.
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