Re: A.V plate is 4.5in below hull...help!
From rosco<br /><br /><br />6/9/05<br />My main concern with the jackplate is that the motoris going to be sitting pretty high up on it's own. Those "bullhorn "cut-outs will make it seem as though it is up in a crow's nest.If I am backing up,sometimes a little water will come in over the bullhorns. I fixed that by fashioning two checkerplate pieces to cover those recesses.If you look at the pics,you can see the 5 odd screw holes where these little plates went.<br /> The jackplates I have seen seem to rely on bolting the motor to them,rather than using the transom clamps.The old girl only has one hole either side that you could bolt it on with.Would that be strong enough ?? . I'm probably going stronger than needed,but I don't think I'd be happy with just the two bolts holding her up.<br /> Plan B is a little simpler. See that 3/8" plate?... now imagine this...... *take motor off<br /> *get another identical plate and fix it 5" up,using 4 or 6 3/8"stainless bolts thru the original plate and transom<br /> *Get rectangular section aluminium 2" x 6"approx.and fix behind raised part of this new plate,to sit on the box section of the boat [where motor sits now ]<br /> *extend that T piece of bracing to the back of this new rectangular section to stop it from going backwards<br /> * to finish ,I've got a bit of 1mm plate that will cover the bullhorn voids<br /> This way,I could bolt it thru the new plate ,and also clamp it on that 2x6<br /> It's strength is gained from bolting it onto the original plate with a 12" overlap ,and only a 5" protrusion.But on the opposite side of the push applied by the motor<br /> Cost wise,the welded option runs at $65/hr plus material. maybe 2hrs plus bits...$250???<br /> <br /> Plan B is mostly parts cost. maybe $100 plus an hours welding ,tops.<br /><br />To the jackplate. The simpler/cheaper ones on iboats seem to be made up of two independant "C"sections of aluminium.So you think the two bolt holes [I'm sure you can see them on a photo ]will hold her up O.K ??.<br /> The section on top for the clamps to hold on to will help,I'm sure.<br /> I've only been to a couple of places looking for jackplates,but no luck so far.I don't think they are all that common out here,but that won't stop me from looking further.<br /> At the end of the day,I think plan B is pretty much like a rosco brand jackplate,but I will investigate further.<br /><br />06/10/05<br /> Plan B is taking shape. Have got the plate..10mm thick and the same size as the plate you will see at the transom.I also got a solid rectangular aluminium bar 20mmx40mm to clamp to.Even bought all the bolts today. Can't get hi-tensile stainless,but explained the use intended to the shop dude and he sold me the right grade.Or so he said to me !<br /> There are a few more things {steering pulleys at motor} to sort out,but we got a long weekend here.Queens birthday.The absolute only good thing about the royals !!<br /> I need to get a thicker block to clamp to ,maybe 60mm . The clamps only close to a minimum of about 50mm<br /> I know that I'm being paranoid,but I still don't feel supremely confident.I know that 10mm plate will not bend,but.....<br /> Once the T piece is welded to the bracing,I'm sure my paranoia will disappear.<br /><br />06/14/05<br />I've stuck with the 10mm plate,but for the clamp piece,I've gone to 60mmx40mm.A serious bit of non-ferrous.<br /> The small notched bits are to sit over the protuding part of the transom plate[if you still have the old pics],and rest on the 1 1/4" black box section where the motor is clamped now. This is to stop the new plate from being bent by the force of the motor.<br /> If you look close at those notches,you can see the line between them .This is the part of the plate that sits above the existing one[the increase in height].<br /> This whole shebang is going to be held with some 3/8" stainless bolts/nylocs.<br /> This lot,bolts &all,cost me AU$95....about US$70,and I reckon it's stronger than a jackplate,too.<br /> Let me know what you think.If you want,you can post this on my thread and show these blokes some serious Aussie overkill !!!<br /><br />
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<br /><br /> <br /><br />I'm still new at this pic posting. Just had my 17 year old show me yesterday.
