Ranger mount height. which bottom? 1990 johnson 140.

[saddlebandit]

Which bottom should I align the large calv to? From the rear it looks like this is the bottom but there is a small deeper bottom. Outboard is a 1990 johnson 140 on a 1982 Ranger 330v330V with turbo lift bolted to lower unit. Confusing.. you would think I would align to very bottom (deeper bottom). I'm not sure this is the case. Can someone help?

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

 

[jestor68]

Re: Ranger mount height. which bottom? 1990 johnson 140.

That inset "deeper bottom" is the actual bottom(keel) of the boat. Typically, if you mount the motor down on the transom, the av plate will be 2-3 inches above the bottom.

Please tell me that you are going to remove that "turbo lift" thing before you try to actually run the boat(in the water).

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

That inset "deeper bottom" is the actual bottom(keel) of the boat. Typically, if you mount the motor down on the transom, the av plate will be 2-3 inches above the bottom.

Please tell me that you are going to remove that "turbo lift" thing before you try to actually run the boat(in the water).

Lol, should I? I got two of them with two twins that were on a 25' Whaler. Won't the turbo lift make it jump out the water quicker with all the weight I have at the stern? I thought it looked kinda cool. ; ) I have the mount the highest in the bottom holes. Do you think I should drop it one or two? Considering it's rated for a 140 and this is I figured it was ment to be in the bottom holes riding hight. I also thought Rangers was suppost to ride with the engine high with nothing but the prop getting wet. I have a 4 blade ss props. I could use all the advise I can get. Thanks.

 

[metriccrescentwrench]

Re: Ranger mount height. which bottom? 1990 johnson 140.

Have you had the boat out? I'm wondering why you think you might need to lower the engine, if the prop's not aerating and if you have enough water pressure then you don't need to lower it.

And you're correct about the fin helping you get on plane quicker. When everything is set up properly the fin will be pretty much out of the water at speed and won't cost you top end speed. They're pretty easy to remove and install, you can always try it with and without and see which you prefer. (There are a good many fin haters, but IMO they have a valid purpose in some situations).

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

I'm going to try to take her out this weekend and see what happens. I just was curious before I sealed the mount bolts. I didn't want to take her out for the first time for nothing. Any more advise is welcome.

 

[Texasmark]

Re: Ranger mount height. which bottom? 1990 johnson 140.

I'm not touching this. You don't want to know what I have to say.

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

You minus well, shoot! You got my attention. I'm curious now and don't think I'd get very far with just one opinion. You can't hurt my feelings, not being able to repair the whaler already did that, not to mention melting my thermostats to nothing when I forgot them on the stove. At least I have two 1990 140's to play with.

 

[Texasmark]

Re: Ranger mount height. which bottom? 1990 johnson 140.

Ok. Accommodate Mr. Jester (and me) by removing that thing.

That is a pad hull. The pad is that flat part of the bottom. As the boat speed increases, the boat works it's way up and out of the water, eventually riding on nothing but that flat portion, and sometimes not on all of it. Purpose is to eliminate as much wetted area as possible to reduce water contact, hence drag, and get more mph.

When on the pad, the boat has 5-10 degrees of bow (front) high attitude which puts anything aft (rear) of the pad deeper in the water. The more set back (farther aft of the pad) the deeper it goes. For that reason the antivent plate will be several inches higher than the line a straight edge would make if laid straight on the pad and extended back, again like Mr. Jester stated.

Unlike an ocean racer with a "chopper" prop, most, if not all of the prop on a BB is in fact in the water. If you trim too far out, with the engine height setup properly, you can actually trim the prop out of the water resulting in increased rpms and decreased mph. Your best trim position is then tucked back in till both are optimized.

HTH,
Mark

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

Sounds good, well put. We'll see what happens and that thing is staying however I did take the one off the other engine when I dropped the lower unit yesterday and after I replace impeller, seals, and repaint I'll most likely not be putting it back on when I swap lower units. I'll also be getting me a jack plate to give the Ranger some more setback. The turbo lifts seem like they would work better on a heavier boat with twin setup like the 25'Whaler. Understood and will definitely get to witness it in person. Thanks for your input.

 

[saddlebandit]

Re: Ranger mount height. which bottom? 1990 johnson 140.

Worked great! The Ranger jumped right up and flew acrossed lake conroe to the north end and back to the dam in no time at all. Went back 100 yrds east of the light house at dusk and as. Soon as I put my line in the water caught me a 20 pound blue. I did notice with the turbo lift if I wasn't careful it would make the bow slam up and down on take off.