23' 1989 mavrick sports boat (magna) rebuild

[Ca2005rsx]

Here is the video of the first trip after trading my motorcyle for the boat.
[video]http://i943.photobucket.com/albums/ad271/picnabber/321242a9.mp4[/video]
Well... Long story short after a few good and bad trips i discoverd flaws. Some exspected some not. Powerd by a mercruiser 3.7l. The charging system was the most obvious. Along with a long list of others. I plan on posting all modifications to the project here. In hope to get advise and problem solving help. Seems to be a good group of people on here. So cheers to all!

After going thru engine i decided to pull the engine for complete overhaul of the boat. Decided to remove deck as well after inspection of front engine bed was toast. Ill post more pictures as soon as i figure why its saying invalid url.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

removing deck

deck removal finished

engine removed

new engine bed glassed in

50 gal. Gas tank moved forward and preping to secure

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

As of now im trying to decide on how to route fuel fill and vent lines. Before filling tank was a slow process due to a dip in fuel fill hose before tank as you can see in the picture. I want to relocate the fill neck either to outside of hull at midship or have a deck fill with only the vent on outside of hull. The propblem being for the deck fill is once the new deck is layed on the tank is maybe 4 inches below. I dont think a 90 degree bend would be wise. Also debated on puting fill neck on top of port side storage box. Theres seems to be enough unused space to fit. But again the bend may cause restriction. Any ideas from anyone on how to route the plubming? 50 gal tank takes forever to fill at pumps only being able to pump slowly due to restriction.

 

[zopperman]

Re: 23' 1989 mavrick sports boat (magna) rebuild

I'd put the fill up in the gunnel. Filler hose is like 7 bucks a foot...

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Gunnel is first thought but clearence issues will cause the 7$ a foot hose to bend and cause a dip before connecting to tank. This was how the original setup was and fill up was a pita. Space between deck and tank is 4 inches. Gunell space is 4 inches or less. Problem is the 90 degree turn that would be needed to do that

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Well after taking with my neighbor that has his own petrolium gas pump biz. He suggested that i use a pre molded 1 1/2 filler hose that has a 90 degree bend. I think it will eliminate the problem i had before i hope.

Illustration of problem

Possible solution ?

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Found a few holes in boat after buying boat here are a few befor and after pics. Areas were cleaned, sanded, down to solid fiberglass. It was important to break away any loose material around area. Once satisfied i injected with epoxy. After cure of epoxy i checked the edges to confirm it was solid enough for finish. Caped the patches with mastic epoxyde putty. This stuff is a two part putty that cures hard as rock. And gave a descent finish after sanded to apply gel coat to later. If holes were completly thru hull i would not use this method.

and after

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Bottom of hull same Process. Po had gobed 5200 for a fix
Before

Seemed that a exstinsive repair was to come. But after sanding this is what all that 5200 was covering

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

here is patch after epoxy injection/two part putty patch

further shaping will be later when boat is ready for new gel coat. Im very happy with the out come of the epoxy injection and 2 part putty process. Rock hard results !

 

[zopperman]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Well after taking with my neighbor that has his own petrolium gas pump biz. He suggested that i use a pre molded 1 1/2 filler hose that has a 90 degree bend. I think it will eliminate the problem i had before i hope.

Illustration of problem

Possible solution ?

You could prop it up so it stays pointed down. Or you could affix it to the underside of the deck. Or you can use an elbow like you proposed.

 

[sqbtr]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Not to be a stick in the mud, but, I doubt you will find "Marine approved" fill hose molded.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Already Contacted this company. Gave deminsions of what length and bends i need. Solid one peice construction. And sending USCG approved paperwork and stamp on hose to boot. Not cheap tho.
http://marineind.com/about_us.htm

 

[Woodonglass]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Looks to me like you've got some de-lamination going on with your glass. The fix on the bow which is above the waterline is prolly OK but the one you did below the waterline is not a good one IMHO. You need to investigate it further from the inside and outside to insure your hull is in good shape.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

I guess i should have comunicated better the cause for the po's 5200 patch and condition it was in when purchased from him. I was told that the roller trailer the boat came with caused the break in gel coat because one roller on port and starboad side sat right on this area. Here is a picture of the area after i pushed the boat back on the trailer to exspose the 5200 gob.

after seeing this i figured the trailer was incorrect for the boat. The roller was causing enough pressure that it was cracking the gel coat. And thus the po's reason for the 5200 gob he put on it. He stated that he did this to prevent delaminating. So once i exsposed the areas in question i sanded all 5200 off down to gel coat. After seeing the reason for his attemp to patch. I opened it up by chiping all cracked gell coat off. With the deck already removed i then moved to the inside of the hull. To look for sign of blisters or voids within the layers. Visual inspection seemed fine as did the audible thumps with a ball pin hammer. So back to outside of hull. Doing final prep to the area i notice the 1/8 inch gap at the corners of the right angles. This is when the O-No face set in. I then had a good friend of my come over that works at a high end boat yard to hear his thoughts. I was told that these fiberglass boats were produced with a negitive mold being sprayed with heaps of gel coat. Then reinforced with fiberglass to make a strong hull. And so the explanation of this gap continued. This area with two right angles the fiberglass was layed quickly and did not conform it to the gel coat. Causing the fiberglass to have a radius roll around the corners. He told me i would have never had a problem with it if the correct trailer was used by th po. Week went by until he brought a a caulk gun size seringe with a 1/8 inch long hose attached. He used it to pump epoxy into the factory maid voids. After cure time he also supplied me with the two part fairing putty. And told me how to use it. After all of this he came back over and started beating the heck out of my boat with a hammer. My first thought was shock until i inspected it after his hulk escapade on my boat. No cracks no dents no nothing. Hard as a rock now he said. Im 100% satisfied with the outcome of the epoxy injection/two part putty solition. Had it been a case a delamination im sure he would have lead me to a different solution.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

To do list:
Secure gas tank
Run new fill and vent hose
Install new filler neck at new location
Path holes left by old filler neck and vent
Instal new bilge pumps with high water alarm
Instal new water pick up and sea ****
Instal live well pump and wash down pump
Frame in below deck battery compartment
Instal 105 amp alternator
Convert from points to electronic ignition
Install new deck with access hatch to battery storage
Install acces plate to gas tank
Install below deck storage hatch
Build new cuddy cabin door
Allign engine to gimball bearing
Reinstall out drive
Build hard top
SprayNew gel coat
Install new bow rail
Install new remote anchor windlass
Fit cuddy cabin with new cushons
Add new helm chair
Build above deck tackle/baitwell station
New gauges and electronics
Convert roller trailer to bunk trailer
Add a tongue extension for launching
Replace all all hardware
Go fishing and win deep sea rodeo

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Has anyone here ever seen a boat like this before? And do you think it possible to convert into a center console? I like the shape of the hull but the walk around ccuddy cabin is just hidious. Primary use of the boat will be day fishing trips. And it seems to just Collect stuff as a storge area anyway.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Im new to some boat lingo. Looking at the picture above would you consider this a stepped hull. Buddy of mine said it was but i have no idea what the difference is. He said its a good thing on a deep v hull.

 

[Ca2005rsx]

Re: 23' 1989 mavrick sports boat (magna) rebuild

 

[zopperman]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Doesn't really look like a step hull

The above is a pretty exaggerated step... but the point of a step, i believe is so that only the step and the transom are touching the water and it helps the boat plane better...
You could do a CC conversion.

 

[oops!]

Re: 23' 1989 mavrick sports boat (magna) rebuild

Im new to some boat lingo. Looking at the picture above would you consider this a stepped hull. Buddy of mine said it was but i have no idea what the difference is. He said its a good thing on a deep v hull.

that is a mock step.......after the discovery channel showed oke mannerfelts stepped hull bat boat.....sales instantly slowed on any hull with out a step.

in order to combat this with out major renovations to the mold or production line..... the manufacturers just faired in a false bottom to the mold and called it a stepped hull.

a stepped hull "sucks" air to the under side of the plaining surface from the side of the boat. this allows the hull to ride on air rather than skim across the water...i reduces drag about 30-40% !!!!

true stepped hulls are actually very rare as they have to be matched with the power, weight, and length of the boat.
tho step height and actual design (degree of rake) are well kept formulas. step height is on averages about 5 inches. and usually 2 steps, giving 3 plaining surfaces.

stepped hulls are usually done on racing boats over 27 feet. and the oke design is winning races all over Europe.

this is a pic of the oke mannerfelt design stepped hull......if you look at the waterline amidships......you see two indentations as the water line

here is a shot of the steps doing what they were designed to do

as far as your hull goes..... no one has to know they are just there for show.......yes...you can tell every one you have a stepped hull. !