3.0 OMC 140-HP

gtaeza

Seaman
Joined
Jun 3, 2004
Messages
54
Hello, I'm here again to ask questions from you guys. I have 1979 OMC 3.0-140-HP with 17"pitch<br />prop. I'm wondering why it takes too long to get<br />on plane with a speed of 2500 rpm. with 2 persons<br />on board. I'm new on boating hobby so I need some<br />advise. Thank you.
 

cobra 3.0

Lieutenant Commander
Joined
Jul 31, 2003
Messages
1,797
Re: 3.0 OMC 140-HP

Gun it until you get on plane then bring her down to where you want to run it. <br /><br /> You can also trim all the way down (if you have power trim) and then trim it up to just before it starts porpoising in the front. I only do this with a heavy 3 person tube and a 3-4 person load in the boat. <br /><br /><br />My 3.0 OMC 1986 cruises best at around 3200 rpm with a 14"dia. x 17" pitch prop with just about any load 2-6 people.
 

petemoss

Recruit
Joined
May 15, 2008
Messages
1
Re: 3.0 OMC 140-HP

Hello, I'm here again to ask questions from you guys. I have 1979 OMC 3.0-140-HP with 17"pitch<br />prop. I'm wondering why it takes too long to get<br />on plane with a speed of 2500 rpm. with 2 persons<br />on board. I'm new on boating hobby so I need some<br />advise. Thank you.

Hi, this is a heavy engine it takes a little longer to get planed out than an outboard . Is the tank full ? Is the engine well tuned ? A lower pitch prop would improve that .
 

Gary H NC

Fleet Admiral
Joined
Dec 1, 2005
Messages
8,972
Re: 3.0 OMC 140-HP

Sound to me like a poorly tuned engine or a very heavy boat.2500 rpms is just barely enough to keep it on plane.
It also is a Stringer drive if its a 1979..no power trim.
 

Maclin

Admiral
Joined
May 27, 2007
Messages
6,761
Re: 3.0 OMC 140-HP

How big is your boat? What kind is it (Bowrider, cuddy cabin, etc.) ? How much does it weigh? It could be carrying around some extra water weight in the foam under the deck.
 
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