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Author Topic:   Hydraulic jack plate
Montauk posted 09-23-2002 07:50 PM ET (US)   Profile for Montauk   Send Email to Montauk  
Just bought a Jack plate for my 1973 Montauk with a 90hp yamaha that does not fit. there is no holes to bolt through for the middle mount to attach to the motor and no material there to drill through to improvise. Does anyone have a jackplate on an older Montauk like mine and what brand is it? I will send this one back if needed and get a different brand. I was assured by a factory tech this setup would work on my Montauk but i will not cut the splashwell to get to the bottom bolts.
Montauk posted 09-24-2002 10:07 AM ET (US)     Profile for Montauk  Send Email to Montauk     
Bigshot posted 09-24-2002 10:56 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Take it with you when shopping. I know boaters world carries like 3 different kinds. If all the same, make a template of your transom and have one made. Maybe your transom was drilled funny?
Montauk posted 09-24-2002 03:31 PM ET (US)     Profile for Montauk  Send Email to Montauk     
Bigshot, thanks for the reply, however I don't have the luxury of shopping in person as I am in the Northwoods of WI. On a 1973 Montauk you cannot use the bottom holes to mount the motor as the splash well does not go down that far. There are 2 threaded holes in between on the yamaha 90 that you screw bolts through the transom and into the motor bracket. I spoke with tech service at CMC and their bracket has enough metal to accommodate drilling a new hole so I will go that way.
Barry posted 09-24-2002 03:49 PM ET (US)     Profile for Barry  Send Email to Barry     
I have a '74 Montauk with an 8" RiteHite jackplate that I purchased off of eBay. See Cetacea page 41 for pictures

My '89 Mercury was mounted such that the lower holes were in the splash well. I still had to drill new holes in the jackplate to get it to work.

Seabrook posted 09-26-2002 02:25 PM ET (US)     Profile for Seabrook  Send Email to Seabrook     
I have a CMC on my 1983 Montauk that works great. I will have to check how the holes are done.
Montauk posted 09-26-2002 04:00 PM ET (US)     Profile for Montauk  Send Email to Montauk     
Thanks Seabrook,
How skinny can you run your Montauk?
Seabrook posted 09-27-2002 10:45 AM ET (US)     Profile for Seabrook  Send Email to Seabrook     
How skinny can I run.....very skinny. Have the CMC hydraulic jack plate mounted where the top of the mounting plate is flush with the top of the transom and the motor mounted in the lowest motor mounting holes (to put the motor as high as possible). What is hard to believe is that you can raise the jack plate to its fullest and the motor still does not cavitate as long as you do not try to run it full throttle or turn sharply. It also has a Stingray tail on the anti-cavitation plate. I am not sure on exact depths, but think planning in 18" of water is no problem and once on a plane with the motor raised all the way, I would bet it would run just fine in 12". I am amazed that it does so well without a tunnel hull, which is great because tunnel hulls can greatly reduce the efficiency of a boat. Hope this helps.
Montauk posted 09-27-2002 01:12 PM ET (US)     Profile for Montauk  Send Email to Montauk     
I think I am really going to like the CMC Jackplate on the Montauk, If i can run in 12" of water I will be smiling big! Just got back from fishing in Galveston, You have some great fishing there, we caught 25 Bull Reds in one day! Thanks for the reply.
Seabrook posted 09-27-2002 03:01 PM ET (US)     Profile for Seabrook  Send Email to Seabrook     
As I said, I have never measured to see how shallow I can run, but I think 12" will be pretty close. I have ran over some flats that we wade and the water is well below my knee. I have a friend that runs a Gulf Coast 18 with a tunnel and I have never had a problem running with him. There were even a couple times that he went down that I never even touched bottom. If you like skinny water, you will love the Montauk with a jack plate. I do, however, advise buying an aftermarket fin for the back. It helps you get on top quick and reduces cavitation while on a plane. I use the Stingray, but I think the others work fine as well.

When you fished down here and caught the reds, did you go out with a guide? I have a couple friends that are guides and wondering if you may have went out with on of them.

Montauk posted 09-27-2002 04:50 PM ET (US)     Profile for Montauk  Send Email to Montauk     
We fished with Mike Williams for one day. It was supposed to be a Tarpon/Shark trip, but it rained hard untill Noon so we fished for Reds till it quit raining then switched to tarpon, but no tarpon seen. Mike has a 25' 1985 Outrage w/twin 115 Yamahas-"Tarpon Express".
mikey morra posted 09-28-2002 11:42 PM ET (US)     Profile for mikey morra  Send Email to mikey morra     
were his twins four strokes? how did his 25 run? I'm going with that same set up...I think..mikey
Montauk posted 09-29-2002 08:17 PM ET (US)     Profile for Montauk  Send Email to Montauk     
His boat performed quite well with the 115's'
But they were 2-strokes. I love the sound of the twin yammies running in sync. If I had a 25 outrage it would be equipped the same.
mikey morra posted 09-30-2002 12:01 PM ET (US)     Profile for mikey morra  Send Email to mikey morra     
hey thanks for the helps with my decision.mikey

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