new boat possible problem

Old Screwball

Petty Officer 1st Class
Joined
Jun 20, 2012
Messages
240
Re: new boat possible problem

Hmmmmm

I started a similar thread down a couple. I have a new Tracker 18' Party Barge with a 75 Merc. GPS says the best I can do is 21 mph with the stock 13.75 X 13. After careful consideration, discussing it here, calling iBoats and ********, and a couple of local boat stores I propped up to a 17. Won't get it for a few days, and won't be going back to the lake until 4th of July week so I'll let you know. My thinking is With the higher pitch I should loose about 400-600rpm, but can run with the throttle slammed and not over rev.
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: new boat possible problem

have we tried other heights? In a logical progression.have you discussed it with the maker of the boat.
Is there a transducer or other device or protrusion that may b e disturbing the water.
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

No haven't tried other heights yet mainly because I don't have a clue as to where it should be besides in the water. Like I said before I haven't found any info about engine height that hasn't been contradicted by someone else. I haven't contacted south bay yet no. I have contacted the dealer whom we got the boat from, I'll explain why we're tired of dealing with them.
Bought the boat last year in August. We wanted a stainless steal prop that was recommended for the boat, they didn't have one in stock so they said bring it back when they would put the trim tilt sensor on because that wasn't installed yet. Why it wasn't, I have pno idea. So when we had time we took it out before the season ended. Realised a trash can door hinge was broke, that the speed wasn't where it should be, and the the motor would overheat in turns. Contacted the dealer they said the prop would fix the last two problems and that the trash door would be warrantied. We took the boat back in February for repairs, they said 2 weeks. We waited a month still no call. So we contacted them, they said the trim tilt sensor was still not in even though they said they'dorder one when we bought the boat in August. Another month goes by we call'm and they say its done. I drive an hour and a half to pick it up and the trim tilt sensor is installed and the prop is installed. I ask if the prop fixed the overheating and speed issues and they acted like I was crazy and didn't tellm a thing about it. After arguing with and showing them the paperwork that stated the problems they still didn't believe me and said I could've just wrote that in. I walk out to the boat and make sure the prop that was on the motor before was in the boat like we were told it wold be and it wasn't. I go back in and asks bout it and they say they told the tech to put it in there and he must've forgot. They go back to find it and come back saying with one saying they think that's the right one after waiting 20 minutes for them to find it. Get the boat back home and realise I forgot the check the trash can door. I go check it and you called it, still broken.

The terrible service and 2 month wait for common fixes are the reasons why I would rather not deal with them again.

Sorry for the book, I kinda got angry thinking bout it.

There is a transducer on the back of the left pontoon. Could that little thing really interrupt enough water to make a difference?
 

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: new boat possible problem

Also, don't be drawn in by "the cavitation plate needs to be at water level" when running full out. This may hold true for many traditional hulls, but Pontoons are a different breed. More times than not, the prop being a little deeper in the water is better, because Pontoon logs funnel alot of turbulence to the prop..
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

Well guys I don't really know what to do next. I would think someone would have an idea with all the info provided. So given all the info in this post what would you try doing?

Also the dry weight for the boat is 2505 without motor. I feel like that's kinda heavy compared to others of similar size.
 

WaterDR

Senior Chief Petty Officer
Joined
May 8, 2012
Messages
730
Re: new boat possible problem

Ok, something ain't right. This siswhat I would do.....need to rule out a few things.

1 - make sure no water in tubes. While on trailer, jerk forward with truck and hit brakes.....listen for slushing.

2 - That motor seems to be sitting way too deep in water for some reason.....maybe it is an illusion.

3 - make sure you have the correct sized shaft! These motors come in 20 and 25" if I am not mistaken. Found out what size your SHOULD have for this boat and then verify by checking the motor serial number if it is correct for the toon.

4 - Stop by a different marina with the boat and have them take a look.

5 - Motor should NOT overheat in a turn.....makes me wonder if the shaft size is not right.

6 - SB is a good boat. I would contact them too.

Good luck!
 

airdvr1227

Lieutenant Commander
Joined
Jul 15, 2009
Messages
1,666
Re: new boat possible problem

According to South Bay's site a 722CR dry weight is roughly 2300 lbs (last year's 900 series is this year's 700 series) so weight would be OK. I'll check the shop today and see what prop they would deliver that rig with.
 

WaterDR

Senior Chief Petty Officer
Joined
May 8, 2012
Messages
730
Re: new boat possible problem

Hopefully, it is as simple as a prop, but holy cow, if it is hitting 6,000 at wot, I am really confused.
 

lncoop

Vice Admiral
Joined
Apr 18, 2010
Messages
5,147
Re: new boat possible problem

I'll confess I'm stumped. Don't see how re-propping would eliminate the loss of cooling during turns, but I certainly don't know everything. Just for giggles have you tried running it front heavy to see if anything changes?
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

Nope haven't ran it front heavy. Will try when i have enough people to go.
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

,Mercury's website show that they did a test on a Bentley 240 cruise with that motor that got 28.6 MPH. Mounted the motor on #1 hole ( does that mean all the way down or all the way up). There wot was 6100 ours is right at 6400. The Bentley weighed 1940 pounds. The prop was a 14x12 vengeance.
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

Well I took some more pictures for you guys to see how it sits in the water. I also parked it going up hill and took out the drain plugs on the back of the toons, they're bone dry not a single drop came out.

Anticav/vent plate in relation to the transom. NOTE the electronics on the far toon.
2012-06-27_10-09-00_920.jpg

Motor height in water
2012-06-27_10-54-36_779.jpg

How the boat sits with approximately 10 gallons fuel and no passengers
2012-06-27_10-54-27_847.jpg

Also put engine muffs on each side of the water intake on the bottom of the motor and each side allowed water through the engine and out the tell-show hole. Motor temp stayed the same 115 degrees on both sides. So they must not be plugged.
Also verified with mercury through serial number that my engine is a 20 inch shaft motor.
 

crb478

Lieutenant Junior Grade
Joined
Dec 6, 2006
Messages
1,036
Re: new boat possible problem

From your pictures it looks to me to be just a tad low in the water, but not bad. Try adding a couple of hundred lbs to the front as far forward as possible. See if it runs better that way. If it does consider raising the motor one hole at a time to get best performance while still experimenting with weight in the front both adding and subtracting. I had a Harris Pontoon once that had an inboard outboard where the foot height was set. I had to add 320 lbs of steel to the front to make it handle properly and to run faster. I bought two storage boxes and the bolted plate steel to the bottoms through the deck at the very front. it worked great that way. I have to believe that your motor overheating in one turn is probably because of turbulance coming off one of the tunes injecting air into the motor. Adding weight to the front(could be someone standing there) and raising the motor are free start there before spending any money.
 

Treker57

Petty Officer 2nd Class
Joined
Aug 23, 2009
Messages
136
Re: new boat possible problem

What size tubes are on that pontoon, they seem small but that could just be the picture. As others have said that motor seem low both sitting and underway. Whats you water PSI when you are running WOT straight and if you start a wide fast turn does the PSI drop?
 

usspforman

Cadet
Joined
Jun 24, 2012
Messages
20
Re: new boat possible problem

Not sure on toon size and I don't know if it has a pressure gauge then its digital and I haven't realized it yet. Will look through settings for it though.
 

The Rooster

Ensign
Joined
Apr 28, 2011
Messages
936
Re: new boat possible problem

Should be 25" tubes, same as mine. Probably does not have a psi gauge for the motor unless you asked for one.
 

newbie4life

Chief Petty Officer
Joined
Jul 19, 2007
Messages
410
Re: new boat possible problem

Not trying to hijack a thread here, just wanna see the pictures -- Anyone else not seeing the posted pictures today? I see avatars and signatures -- clicked on the attachment paper-clip to download the pics... no lucky. Tried 3 different computers and a phone. Hard to believe I would have the issue on 4 different devices...
 
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