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Conference unifix::sailing

Title:SAILING
Notice:Please read Note 2.* before participating in this conference
Moderator:UNIFIX::BERENS
Created:Wed Jul 01 1992
Last Modified:Mon Jun 02 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2299
Total number of notes:20724

2073.0. "Why 9.9 hp?" by SYORPD::DEEP (Bob Deep - SYO, DTN 256-5708) Mon Aug 16 1993 11:58

Excuse the newbie question, but what is the significance of a 10 hp engine?

Most of the sailboat motors that I see are all 9.9 hp or lower.   Is there 
something regulation- or registration-wise about an engine that is 10 hp or 
larger?

Thanks... Bob
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2073.1Keeps the power boaters awayCSC32::L_BRODEURSat Aug 21 1993 23:257
    In Colorado there are several lakes that have a 10 HP motor size limit.
    I guess its to preserve the natural beauty of certain lakes and also to
    keep high powered boats that are used to pull water skiiers off of
    these lakes. Many of these lakes are also reservoirs and by limiting
    the motor size to 10HP it keeps many boaters away.
    
    Lee
2073.2TOOK::SWISTJim Swist TAY2-2/C1 DTN 227-3615Mon Aug 23 1993 16:293
    Isn't is because at one point under 10HP didn't have to be registered
    in some places?  
    
2073.3no point in making it largerNOVA::FINNERTYlies, damned lies, and the CAPMTue Sep 06 1994 13:547
    
    I think it is because (a) a 10hp engine can push most sailboats at
    hull speed, and (b) a larger engine would only add weight off the
    stern, where it isn't needed or wanted.
    
    /jim
    
2073.4POLAR::KELLYMon Jul 10 1995 11:452
    In Ontario, boats with outboards of 10Hp or more, have to be registered
    
2073.59.9 HP maybe same as 15HP modelMUZICK::THOMPSONMike LMO2-1/M13Tue Jul 11 1995 18:145
I read (in I think Practical Sailor) that a 9.9 HP outboard may
actually be identical in design as a 15HP - except for a screw or two
to limit the power! Worth checking out if you intend to buy one.

	Mike
2073.6MCS873::KALINOWSKITue Jul 11 1995 18:5910
    Most motors from a given manfacturer of a given cc are the same, the
    only real difference is the cam that allows the carb to open a bit
    more.  This gives more revs which is the higher horsepower.
    
    For sailboats it really doesn't add anything. How often do you rev out
    your outboard?  You are better off to get lower reving(ie hp) engine that
    puts out some juice for the battery since most of us never use them
    there iron lungs.
    
    the PS article is very good on the best brands to look at.