SS that is on it= 48-16930A40-20P (Quicksilver Laser 2)
Original Prop (beat up) = 48-77348A40L-21P (aluminum)
5800 RPM but doesn't want to plane off. Can anybody interpret these #'s?
89' Marriner
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SS that is on it= 48-16930A40-20P (Quicksilver Laser 2)
Original Prop (beat up) = 48-77348A40L-21P (aluminum)
5800 RPM but doesn't want to plane off. Can anybody interpret these #'s?
89' Marriner
Ed's prop shop---memphis
what's max hp @ what rpm
ES what was the hp of his kicker?
Sorry 89' Mariner 115
Kicker is 9.8
You've got 21" pitch and a 20" prop, which off the top of my head, sounds about right. 5800 sounds about right assuming you've got a range of up to 6K rmps - need to find out. Trouble is, I'd guess 20" in max on that big and heavy of a boat with a 115, but rpms sound about right. My guess is that your motor is either way too low in the water or way too high.
Wannabe...
[QUOTE=EmptyStringer;1571033]SS that is on it= 48-16930A40-20P (Quicksilver Laser 2)
Original Prop (beat up) = 48-77348A40L-21P (aluminum)
5800 RPM but doesn't want to plane off. Can anybody interpret these #'s?
89' Marriner[/QUOT You are trying to come out of the hole with the motor trimmed down......right? If not try that and do not start trimming up untill you are on plane
.
Looks like your SS prop is a 20 pitch and your aluminum one is a 21 pitch. They nornally go down a size in pitch when switching from aluminum to SS because the SS will not flex like the aluminum.....looks like they did this. If you are turning 5800rpm running a 20 pitch prop and having trouble planeing out you probably should go to a 19 pitch. I am assuming that your dia. is 13 inch. On my 115 yammy the reccommended top rpm range was 5000-6000. My G3 with the 115 ran 5500 with a 13X22 ss prop.....my 90 yammy is running 5500 with a 13X19 ss prop. I was advised at the boat shop to try and hit the middle of the rpm range and thats what I did. Your best bet is to go to a boat shop or prop shop where they will make a reccomendation on what to try first and if that dosen't work they will exchange props with you untill you get it right.
Your rpm's are dear on. And the 20 prop should not be the issue. I, like WB (can't believe I'm said that) am thinking motor placement
Don't worry Tman, it gets easier to admit I'm right the more you do it.
Come to think of it....it ought to feel quite natural for you by now.
Wannabe...
Wannabe is right ES....as wide as your boat is you need less pitch.......but your turning 5800 now and less pitch is going to bring those rpms up a little higher so you need to see what Mariner reccomendations are for the max rpm's on your motor. .......I have a feeling that a 19 will do the job for ya. Still best to.... Check with a boat shop or prop shop and see if they do not agree
Tman , I know that had to leav SKID marks!Quote:
Originally Posted by Wannabe...
Motor placement ya gewb. Raise it up 1" or 1 bolt hole at a time til you get what you want.
just like dual wheels, lolQuote:
Originally Posted by satdoc1
Won't lay eyes on the motor for a while, but if I had to guess, it is sitting too low. Can't near bout trim it all the way down when it's on the trailer
well just keep guessing, dummy (or gewber if you prefer a more PC term)........ 'cuz you'll keep getting the same answer....... NOTHING!!!!!Quote:
Originally Posted by EmptyStringer
Hmmmm. Dummy? Dang that's purty straight forward.Quote:
Originally Posted by C N
uh well I suggested that maybe the motor needed to be adjusted on the jackplate at least a week ago.... and the __________ (insert your favorite ES nickname here) is still guessin' as to what's wrong......... and I'm a dumb woman.......... c'mon..... let's get wif' da program!!!!!!!!Quote:
Originally Posted by Minnerman
It's ok CN. I know that minner is somehow channeling his thoughts through your mouf
Wish I could blame it on him, ES, but I can't. I'm going to give you some homework since you like homework. Go find your Pop's boat. Adjust something..... any durn thing...... something to ATTEMPT to make it plane off at 5800 rpms and come back and report to us how it went. Just a subliminal message here...Quote:
Originally Posted by EmptyStringer
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
I don't want to try to tell you what to do so just think of something and do it. We'll be waiting tomorrow.
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
try raising the motor on the jackplate
CN tellin it to ya as straight as ANYONE can ES
Raise ya mota.Thumbs Up
Try this ES. Get pops to run the boat down the lake while you're layin on the back deck. At wide open throttle stick yo arm in the water as deep as you can reach. Feel the amount of force it puts on yo arm. Then pull yo arm up about an inch at a time and see if the resistance slowly goes away. It's the same principle as yo motor.
You may wanna consider installin a whale tail on it. I had to on mine. It will keep the prop from blowin out and keep the boat on plane. Ifn you do get one, get the aluminum one, not the thick plastic one.
Yep, gotta to agree that this is the place to start.
try raising the motor on the jackplate
Ifen u rase it up and u ain't got no water pressure gauge, you'll be saying O Shxx!!!
Right after you smoke your Pop's engine. But what do I know.
You can't wear but one T- shirt at a time!!!
If ya raise it up and it's still peeing it will be fine and that boy wears 2 or 3 t-shirts at a time!!!
He is fixin to get a foot up his a$$. It might pee idoling-a-long---but at WOT. That's wide open throttle, by the time you look back to see if its pissing water it may be to late,
it's take's maybe 15 seconds to cook the engine!!! Again what do I know???
If you going to jack with the jackplate install a water pressure gauge!!!!!!!!
P.S.
Is the engine hitting on all cylinders, if it's not, it might run good at top end but it will be hard to get on a plane.
Hey G , less pitch put's more load on the engine,more load=less RPM's.Quote:
Originally Posted by "G"
As long as the fins on the side of the foot above the prop aren't above the bottom of the boat he shouldnt have a prob. Pressure gauge is a good idea for sure but a boat not getting on plane and lugging the whole time will overheat as well. Sounds like it's under powered.Quote:
Originally Posted by TUSHHOG
None of us seeing it first hand aint helping either.
Good luck ES.
115 Mariner 4 cylinder. One of those that runs on two cylinders til you punch it. It definately has enough power
First hand is more than a plus, it's a must. Just got to by what he see's. Hate to see the boy mess-up.
looked this up this AM. not sure if it's yours. If it is your RPM's at WOT are 4750-5250...too much prop.
http://www.marinepartsman.com/Mercur...1988/EN_18.PDF
Ain't this statement bassackwards? I always thought more pitch=more load=less rpm'sQuote:
Originally Posted by TUSHHOG
Bassackawards for sure, I am running a 26P 4 blade and if I drop to a 24P 4 blade I will go over 7 grand.Quote:
Originally Posted by Minnerman
ES, if that link to the manual is correct for your motor and you in fact are turning 5800, then you've got too little prop. Rule of thumb is 1" for every 200 rpms. Sumpn aint right. And turning 5800 on a motor designed for 4725-5250 is cause for a kablooie. Check that first. And double check it.
In addition, if you are underpropped and turning 5800 at WOT, I'll bet you're turning north of 6 grand coming out of the hole. Pistons, connector rods and top bearings don't come cheap.
Wannabe...
Exactly right minner!Quote:
Originally Posted by Minnerman
Minner.... he doesn't even realize it was his statement as well......DohQuote:
Originally Posted by "G"
Oh yes I do CN ...Just thinking......possibility that Pops boat has a worn prop hub and its slipping just enought to give a high rpm reading and slipping the prop enough that you cannot get out of the hole and on plane good. It may just be time to have a new hub pressed into that prop.Quote:
Originally Posted by C N
Call JR's Marine in Brandon and ask JR or his son what you need. Get away from them yankee gewber machanics.
Good thinking G. You ain't near as ignernt as that secret poll we took while you were out would indicate. Only hitch is, if it was slipping that bad, he should have easily heard it over revving coming up on plane. The boy is long on questions and short on answers, but I don't really mind. Makes for an enjoyable time making sport of him.Quote:
Originally Posted by "G"
Wannabe...
If the rpm limits that were posted are correct......the prop hub wouldn't have to slip but a little..... a 550 rpm difference on a two stroke would not be that noticable ( they sound like a mad bumble bee anyhow)......old motor, old prop......that could be it. But, he really needs to go to a prop shop and find out.....it does not cost just to ask them questions ya know. See what their thoughts are and go from there.