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Old 03 January 2008, 17:16   #1
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Engine jack plates

Hi guys

any body experience of enginejack plates?

views welcome on efects on boat handling, lateral movement, vertical movement, weight, max horse power, etc.

I am considering one for a Suzuki 300df.

thks
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Old 03 January 2008, 17:23   #2
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I know Cookie will be able to give you some valuable advive .Perhaps you could PM him
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Old 03 January 2008, 18:58   #3
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Codprawn's got one too: a jack for a jack
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Old 03 January 2008, 19:04   #4
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Quote:
Originally Posted by Downhilldai View Post
Codprawn's got one too: a jack for a jack
Oi mush!!!

Yes I have the CMC with 10" of setback. It is a nice bit of kit and despite what certain people said my engine still hasn't fallen off..........

I have a big problem with mine - the idiot who fitted it mounted the engine so that it was in the normal position right at the top of travel - so I have no real adjustment on it!!! I am taking my boat out of the water as soon as my trailer is ready and will mount the engine properly.

Remember if you fit one to install a water pressure gauge ao that you know if you have lifted the engine too high.

I suspect that jacks don't make that much of a difference but the setback is handy as you get more room in the boat and it's great to be able to get the engine high up in shallow water!!!
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Old 04 January 2008, 05:39   #5
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Quote:
Originally Posted by Ezgoing View Post
Hi guys

any body experience of enginejack plates?

views welcome on efects on boat handling, lateral movement, vertical movement, weight, max horse power, etc.

I am considering one for a Suzuki 300df.

thks
Contrary to what Codprawn says they do make a big difference in a properly setup boat!

We use them for racing, but they are expensive items which require maintenance. If you are looking for setback or extra room I would fit a fixed bracket - zero maintenance and same effect. We offer a reasonably priced cast one now!

What do you get for your trouble? A definite increase in top speed, although this will be limited if you don't have a standard gearbox as you will lose water pressure if you lift the engine high enough to gain the full advantage. Other extra benefit would be in shallow water.

If you still want one the Stainless Marine Gorilla 3 is the one I would recommend, but a 300DF is a big lump with a lot of torque, and you would have to be considerate to it! It has fewer parts and requires less maintenance than other makes, and in racing that is the one the majority of racers fit, and believe me we can destroy equipment!

Codders is right about the pressure gauge - if your engine doesn't have one fit one - it might be good to have a separate one anyway.
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Old 04 January 2008, 13:20   #6
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Yes in a racing boat but I suspect the difference is smaller in a cruiser. Of course I don't really know until I adjust my mountings!!!
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Old 04 January 2008, 17:39   #7
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300 hp

Has anyone tried one with 300 hp?
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Old 05 January 2008, 07:27   #8
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If you're using a jackplate, is there a noticeable difference in the way using the trim affects the handling to not having a jackplate?
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Old 05 January 2008, 13:52   #9
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My first post so go easy! Yes, I have fitted a jackplate to my Boat, a Tornado 7.5 with Yamaha 300. Its a Bobs Machine Shop one with 6" setback supplied by Steel Developments and the gains are quite small, but they are there. On my setup i picked up around 3-4 mph top speed and it has helped cruise aswell. It now tops out at 64mph burning 100 litres an hour(YIKES)! And will cruise with a light load (2 people 100 litres fuel onboard) at 30mph burning 32litres an hour. But when loaded for long cruise with 300 litres plus 4 crew its more like 36 litres an hour at 30 mph. Prop is a Mercury Tempest 23". Hope This Helps
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Old 05 January 2008, 15:58   #10
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Has anyone tried one with 300 hp?
I used a Gorilla jackplate on my cat which was fitted with a 300 promax and had no problems.
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