revman Posted July 27, 2005 Share Posted July 27, 2005 just baught a 94 ranger 17ft with a 115 hp johnson...the boat has a hard time brakeing plane...i installed a (dolphin) on it...the prop that i got with it is a 22 so i tried a 17 and it comes out better but lost 6mph...any ideas would help greatly... thanks revman Quote Link to comment Share on other sites More sharing options...
Bass_junky Posted July 27, 2005 Share Posted July 27, 2005 First, I have a couple of questions. What is the WOT (wide open throttle) rpm's ? What is the spec'd maximum rpm's of the motor, i would guess 5200? a 17" pitch sounds a bit small for this motor/boat. Is there a jack plate installed on the motor? Reason I ask about the jack plate: When I first purchased my boat I put a dolphin/hydrofoil on to increase planing time. A year later I installed a manual jack plate and didn't gain any top end speed after adjusting several times. I removed the hydrofoil and immediately gained 5-7 mph. Quote Link to comment Share on other sites More sharing options...
gamblerOH Posted July 27, 2005 Share Posted July 27, 2005 That boat should not have any problem getting on plane. I'm guessing you may have other problems. It sounds like maybe an electrical prob such as a stator or powerpack. What kind of rpm's did you get with the 17 pitch on it? You should have been easily over the redline with a 17 pitch prop, if it wasnt I would look to the stator. Your stator has a high speed and low speed circuit and it sounds like the high speed circuit may be causing you some problems. I once had a merc that acted the same way and it turned out that the floats in the carb. were letting gas seep into them and eventually they got so heavy they could not float anymore which caused a flooding problem. Look at your carbs with the engine running and see if they have any gas coming out of them, this will either be a float bad or a bad needle/seat. I hope you dont have any of these problems but most of them are fairly easy to fix. Quote Link to comment Share on other sites More sharing options...
revman Posted July 28, 2005 Author Share Posted July 28, 2005 with the 17 prop it does go over the red line of 5200 rpm...i also had the floats checked and the ignition...everyone i had talked too seems to think its a prop problem...do you think i shouldnt have a problem with the 22??? thanks revman Quote Link to comment Share on other sites More sharing options...
gamblerOH Posted July 28, 2005 Share Posted July 28, 2005 I dont think you should be having problems with a 22 pitch. A friend of mine has a 17 footer with a 115 merc and it will redline at 5500. The rpms drop a little if the boat is loaded heavy so thats why he keeps it on there. Keep me posted, i'm curious to know what you find. Quote Link to comment Share on other sites More sharing options...
revman Posted July 28, 2005 Author Share Posted July 28, 2005 thanks gambler im going out tonight with a 19 and gonna try that...i will let you know how it works...i honestly dont think its in the motor it runs great on bottom and top end...thanks for the advice..... Quote Link to comment Share on other sites More sharing options...
revman Posted July 29, 2005 Author Share Posted July 29, 2005 you were right i tried the 19 and still the same thing...i went with a local boat shop tech. and he seems to think its in the float adjustment because when the motor is level it idles fine, as soon as you trim it all the way down it starts to spit and spudder...it just doesnt have the balls to spin up because of too much fuel...the boat has a 30 day warrenty so im just going to take it back to them and see what happens... thanks revman Quote Link to comment Share on other sites More sharing options...
NBR Posted July 30, 2005 Share Posted July 30, 2005 I assume you are tucking the motor all the way down before you start. IF not you should! Quote Link to comment Share on other sites More sharing options...
Low_Budget_Hooker Posted July 30, 2005 Share Posted July 30, 2005 Is this brand new?? If so, it sounds like you may need to take some quick steps to avoid owning a lemon. That should be factory tested to Ranger quality standards I would have thought. Quote Link to comment Share on other sites More sharing options...
revman Posted August 4, 2005 Author Share Posted August 4, 2005 just got my boat back from the dealer and it was the carbs...they rebuilt them, and also something to do with a power pack or packs...anyway the boat runs great...thanks for all the info.......revman.. Quote Link to comment Share on other sites More sharing options...
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