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Old 06 April 2008, 10:19   #1
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Long Live the Sib Review

Simple & great ideas to perform to sibs to better their performance and lasting time between service maintenance and costly repairs.

01-Glue a small d rin’g in the middle of the inner bow to tie your gas tank, when full will have 24/26 kilos to better balance the sib specially when single driver or light load use. If your sib is equipped with a front bag harness, will have more extra kilos. Being tank and front bag one in top of the other, more available sib space.

02-Glue 2 (12 x 6 cm) same fabric patches in the middle of each 2 side joiners, this will solve the abrasion that is produced at these points specially when the sib is not used correctly inflated/used on bumpy seas. With a smooth metal paper file, file all rubber borders that comes in contact with the patches. Re glue with a proper epoxy cement all rubber side joiners endings, comes very easily off once on boat and by some strange and stupid reason comes already delivered factory faulting. After gluing, file any existing protuberance border between the aluminum joiner and the rubber endings, the smoother, the better. The idea is to cut a patch at least 1 cm higher than the joiners for good lateral fabric protection.

03-Cut a proper long tube to tube & wide stripe of fabric and glue it in the transom’s lower part, where the aluminum floor meets against the lower transom. Newer aluminum sibs floors are coming with a open u shape form in the last section floor, this U cavity with time use will hold lots of sand and produce extreme abrasion to the lower transom fabric. Other alternative will be to seal off this u shape with silicone/sikaflex or appropriate material and re file. Once filled, must not protude u shape.

04-Glue a U shape fabric stripe with a hole at the extreme stern keel ending, pass a appropriate string through the hole, inflate to correct pressure, temper the keel and tie it to the middle inner engine plate, will have a correct all times perfect aligned keel.

05-Third world bimini top: screw a metal clamp in lateral middle of front seat, drill a hole the same diameter as the lower umbrella tube on a round wooden base, center & fix with 6 minutes epoxy glue, let dry. Good & funny sun shelter shade once anchored, perfect for summer.

A usual use appropriate PVC or Hypalon fabric patches and glues, 2 parts mix is better and will last longer than single parts mix emergency glues. See attached photos for better visual comprehension.

Long Live the Sib….

Happy Boating
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Old 06 April 2008, 10:33   #2
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Thanks Locozodiac, Very useful guide!
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Old 06 April 2008, 16:49   #3
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Good stuff & excellent pictures.
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Old 07 April 2008, 09:36   #4
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Awesome, some useful hint there, is it common for sand to wear out a sib at the side joiners? i think i need to sand some of my edges, especially the H floor joiners as they are particularly sharp and have even scratched the bottom of my sib.

keep the useful hint coming loco,

cheers.
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Old 21 April 2008, 16:07   #5
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Quote:
Originally Posted by Locozodiac View Post

01-Glue a small d rin’g in the middle of the inner bow to tie your gas tank, when full will have 24/26 kilos to better balance the sib specially when single driver or light load use. If your sib is equipped with a front bag harness, will have more extra kilos. Being tank and front bag one in top of the other, more available sib space.


Happy Boating
Hi Locozodiac,

This would work fine on a small SIB, however I guess one would need to install longer fuel line for bigger SIB. Would installing longer fuel line have any negative effect on the engine supply and what is a max lenght ie. in case you wanted to reach inner bow of 3.4-3.8m SIB??

Regards
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Old 21 April 2008, 16:23   #6
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Quote:
Originally Posted by danilo View Post
Hi Locozodiac,

This would work fine on a small SIB, however I guess one would need to install longer fuel line for bigger SIB. Would installing longer fuel line have any negative effect on the engine supply and what is a max lenght ie. in case you wanted to reach inner bow of 3.4-3.8m SIB??

Regards
Danilo - I don't have a SIB but I do have a 3.9m boat. My fuel line is long enough to reach the front of the boat (with some to spare) and doesn't seem to have a problem (with a 20 HP 2 str). The only issue I can predict is it will take longer to prime the fuel with the bulb. The same diameter fuel lines are used with much bigger engines, and on much bigger boats (where 3.8m is still the back of the boat!) so I don't expect a problem with the pipework delivering the fuel.
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Old 21 April 2008, 16:30   #7
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Polwart, Thanks for your prompt answer.
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Old 22 April 2008, 08:45   #8
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Hi Locozodiac,

This would work fine on a small SIB, however I guess one would need to install longer fuel line for bigger SIB. Would installing longer fuel line have any negative effect on the engine supply and what is a max lenght ie. in case you wanted to reach inner bow of 3.4-3.8m SIB??

Regards
Have been using bow d'ring to hold tank down on 330/360/380 models, with no problem at all, you gain more space availability, works and balance better the sib. All gas tanks brands are not delivered witht the same gas hose extention. We are using Tohatsu engines and gas tanks that comes with appropiate lenght for those three models including smaller sibs, the hose runs through the middle of the tank/sib floor on to the engine. Anyway you can change for a new lenght hose to pass sideways if centered passing is unconfortable for you, no problem with pump nor primer bulb, if extending use same original hose diameter.

Happy Boating
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Old 22 April 2008, 18:07   #9
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once had a extra long fuel pipe on a large sib ,tank up front in the bow with a long fuel hose running around the bottom of the tubes, i thought that the fuelpump might be under more strain but a retired marine engineer said that its the lifting up of the fuel that puts more strain on the pump than a long run and there was only about 30 cm head of fuel to lift when running with bows up and a low transom.
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Old 23 April 2008, 10:52   #10
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Quote:
Originally Posted by m chappelow View Post
once had a extra long fuel pipe on a large sib ,tank up front in the bow with a long fuel hose running around the bottom of the tubes, i thought that the fuelpump might be under more strain but a retired marine engineer said that its the lifting up of the fuel that puts more strain on the pump than a long run and there was only about 30 cm head of fuel to lift when running with bows up and a low transom.
In two years we been placing fuel tanks on prow with "factory lenght hoses" haven't had any pump problems so far, will need a full gas tank to lift fuel better and compensate the tank bow inclination, when engine starts to misfire because of "low fuel", generally 1.5 gallons or less, place a folded towell under the tank in the opposite corner to level gas out. Anyway, pump parts are extremely cheap, not a big issue to worry about and the better balanced sib ride is fully justified.

Happy Boating
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