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ContinuousWave: Whaler Performance
Engine mounting height on a 15' w 70hp
|Author||Topic: Engine mounting height on a 15' w 70hp|
posted 10-13-2003 05:55 PM ET (US)
I am trying to get a 70hp for a 15' sport, how high can I mount it without having water pressure problems. I plan on running a stainless prop. Thanks, Scanner Boat
posted 10-14-2003 11:20 AM ET (US)
I ran mine all the way up and she handled like hell and would blow out. Even at this height it had OK pressure. With the engine about 2" above the transom she would slip some coming out of the hole WOT and then grab, like changing gears and that was the ultimate height in my opinion, damn thing hauled booty.
I ran a 13x19 SS custom cupped to a 20". At 5900rpms I would do about 47+ best GPS was a tad over 48. This was with a Johnson.
posted 10-14-2003 09:12 PM ET (US)
That sounds good. If I can get this 70 and it is good I want to pass my friend with a 75 merc.
posted 10-15-2003 12:31 AM ET (US)
Ya... it gets real fun up around 45 knots in a 15... it's boating at it's best... nice and close to the water. My light Stripe is a blast with a wonderful mid 80s 70hp Envinrude.
It ages you a bit when you see a wake ahead at WOT. My kids love it!
posted 10-15-2003 10:41 PM ET (US)
Did you use the standard mounting holes or the bolt through into the blind threaded holes in the motor bracket?
thanks, Scanner Boat
posted 10-16-2003 01:46 PM ET (US)
Standard holes but if boat was set up for blind holes then you are beat and will ave to use blind holes or get a jackplate.....get the plate anyway.
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