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causewayskiier
01-29-2007, 12:23 PM
Anyone put in (or replaced) gas shocks for lifting engine cover. I have a 1992 Prosport 205 that I would like to put the shocks on - it did not come with them originally. I need to know what size to get (length and pressure) and exactly where to mount them, how far forward from hinges on the floor and how far foward on the engine cover. Any on have any experience?

east tx skier
01-29-2007, 12:35 PM
First year for them was 93. I replaced the one for my observer seatback. After having trouble finding them at my local auto parts store, I tried a MC dealer. It ran me about $11. Try www.mymastercraft.com. It may prove less trouble than trying to find a match locally without a part to compare to it.

dsoby
01-30-2007, 04:46 PM
NAPA and West Marine also have extensive inventories.

beef
01-30-2007, 04:54 PM
or Overtons. They have the shocks and connecting hardware, too.

bbeach
01-31-2007, 08:05 AM
CausewaySkier - Let me know what you find out... I'd like to put 2 shocks on my 90 (ever dropped that engine cover on your toe? YOW that hurts!)... They would need to be pretty long and have a fair amount of pressure to support the weight of the hood...

Anyone got a suggested weight/pressure to start with...?

causewayskiier
01-31-2007, 02:01 PM
Actually I have already attempted the task but have been unsuccessful. I think it is going to require some trial and error as far as placement. I have had it where my engine cover is pushed too far forward therefore pulling the screws out of the floorboard and too far back where it puckers the floorboards up. I was hoping someone on the board had done some of the trial and effort already.

bbeach
01-31-2007, 04:24 PM
At first thought, logically the shocks will have to mount to the boat behind where they mount on the hood so when the hood closes the shocks can swivel forward... Shocks would have to be mounted on a swivel of some sort and the pressure needed will definately need to be figured out using trial and error...

Anyway to physically measure the weight before you go buy shocks to at least ballpark it and get it close? I guess maybe weigh the front corner of your hood (since obviously if you measured the entire weight of the hood your weight would be too much when the hood is anchored to the floor on one end)... And then the length of the shock would need to be as high as you want the hood to lift up, considering that closing it must allow enough space for the shock to close and swivel forward...

Anymore thoughts? this seems like a great addition to the older MC's and fairly inexpensive upgrade...

east tx skier
01-31-2007, 04:26 PM
That's why I ultimately bought mine from a MC dealer. I had no trouble finding the length, but the weight was tricky to come by. Plus, in my case, I had something to compare it to. Without that, it's trickier.

causewayskiier
01-31-2007, 05:24 PM
Having a MC dealer near can't hurt. My nearest dealer is a couple hundred miles away.

east tx skier
01-31-2007, 08:36 PM
As is mine. I stopped by one in Houston when we were down there one weekend. My nearest dealer is b/w 100-200 miles away, too.

McFire
01-31-2007, 09:58 PM
I will be replacing both of the gas shocks/springs for my engine cover. I have a 1994 ProStar 190. The springs are labeled as "SPD 5300-30A". I called the manufacturer (SPD. 1-800-720-2633). While they no longer make that part, they gave me a reference number for the part that replaces it (SPD-GSNI-5300-30). They also gave me a NAPA part #819-5592. You can check out the on line catelog at http://www.spdhardware.com/.

My boat is in storage or I would measure the location of the mounting hardware. I pulled the spings when I winterized, knowing I needed new ones. Good luck

east tx skier
01-31-2007, 10:01 PM
Great info, McFire. Thanks!

Ric
02-01-2007, 08:18 AM
all good suggestions and I will add one
you will need to fashion a latch of some sort for the front of the cover base if you add shocks
dont want it blowing open going down the highway or hitting big rollers in the lake:eek:

east tx skier
02-01-2007, 11:18 AM
all good suggestions and I will add one
you will need to fashion a latch of some sort for the front of the cover base if you add shocks
dont want it blowing open going down the highway or hitting big rollers in the lake:eek:

Huh? No latch on mine.

Ric
02-01-2007, 11:19 AM
Huh? No latch on mine. That doesn't make you cool.

east tx skier
02-01-2007, 11:49 AM
That the older boxes aren't clam shell may make a difference though. I've had one come up on the highway (old I/O). Not fun as I was on my way to trade it in. Held together fortunately.

I think these boxes are generally heavy enough that they don't fly open. Hope I'm right.

airdrew99
02-01-2007, 11:59 AM
all good suggestions and I will add one
you will need to fashion a latch of some sort for the front of the cover base if you add shocks
dont want it blowing open going down the highway or hitting big rollers in the lake:eek:
It depends on the location of the gas shocks and how much leverage they have. I recently put a new shock on my observer seatback and it doesn't open by itself until the seat back is about halfway up. The same priciple should apply on the engine cover.

Ric
02-01-2007, 12:15 PM
true


a nice perko latch is good medicine

Upper Michigan Prostar190
02-01-2007, 05:04 PM
Boy, this is a good retro fit. I would like to do this also. but there is some definite trial and error involved. I wonder if anyone knows how to determine this before you start drilling pilot holes all over the place. There are so many factors involved:

Placement on engine cover
Placement on floor
shock length extended and closed
weight rating of shock

If you could narrow it down a bit before trying it. It would be cool if you could mount the hardware, and then just find a store that has a bunch of shocks to expereiment with until you find the right combination.

I wonder if Mastercraft can lend any assistance on this? for placement locations and specs on shocks. I wonder if the 93 settings would work on older boats?
:confused:

Upper Michigan Prostar190
02-01-2007, 05:08 PM
:confused: Anyone got an Easy button??

east tx skier
02-01-2007, 05:10 PM
I may replace my shocks. As they are already installed, when I get around to it, I can take measurements for factory placement.

Upper Michigan Prostar190
02-01-2007, 08:15 PM
:) Sounds good East!:)

TMCNo1
02-01-2007, 08:23 PM
I may replace my shocks. As they are already installed, when I get around to it, I can take measurements for factory placement.


I think I will too. My boat rides kind of rough and bounces a lot in waves!

east tx skier
02-07-2007, 10:54 PM
:) Sounds good East!:)

Okay, UMP, here you go. Just replaced mine and what a difference. I never realized how bad they needed replacing. The part number was spot on.

http://i82.photobucket.com/albums/j262/dnortonames/MotorboxLiftingShocksattachmentdiag.jpg

causewayskiier
02-13-2007, 05:41 PM
I really appreciate the drawing that is just what I was looking for.

east tx skier
02-14-2007, 11:09 AM
Cool. Hope it helps. One thing I didn't include are the part numbers for the attachment brackets. UMP shot me some links from overtons and I verified them. Maybe he will post the part numbers for those.

causewayskiier
02-14-2007, 11:43 AM
Yea If you can find out the part number that would be great. But what would be just as helpful is if you could tell me the length of the shock and the weight rating (pressure). Since I can buy them at my local West Marine.

east tx skier
02-14-2007, 12:41 PM
They should be able to cross reference it to NAPA part number 8195592 (http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=470&LineCode=BK&PartNumber=8195592&Description=Lift+Supports+-+Universal+Gas+Charged). It's an exact replacement for the shocks. Attributes: Compressed Length:12.00". Extended length:20.00".

You'll need a pair of Gas Spring 90 degree; Mounting brackets, (sold in pairs) (Overton's Part Number 33613 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&item_num=33613&fcat=2C7C)). These are the ones mounted to the floor with the nub facing inward.

You'll also need a pair of Gas Spring Flat Mounting brackets (sold in pairs) (Overton's Part Number 74273 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&merchID=1006&item_num=74273)). These are the ones mounted to the inside of the motor box.

airdrew99
02-21-2007, 08:10 PM
They should be able to cross reference it to NAPA part number 8195592 (http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=470&LineCode=BK&PartNumber=8195592&Description=Lift+Supports+-+Universal+Gas+Charged). It's an exact replacement for the shocks. Attributes: Compressed Length:12.00". Extended length:20.00".

You'll need a pair of Gas Spring 90 degree; Mounting brackets, (sold in pairs) (Overton's Part Number 33613 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&item_num=33613&fcat=2C7C)). These are the ones mounted to the floor with the nub facing inward.

You'll also need a pair of Gas Spring Flat Mounting brackets (sold in pairs) (Overton's Part Number 74273 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&merchID=1006&item_num=74273)). These are the ones mounted to the inside of the motor box.
Eastie, How far does your engine cowling open with the gas struts? Right now on my 91 Prostar we open the cowling until it rests on the rear seat and it allows plenty of room for engine maintenance.

airdrew99
02-21-2007, 08:10 PM
They should be able to cross reference it to NAPA part number 8195592 (http://www.napaonline.com/MasterPages/NOLMaster.aspx?PageId=470&LineCode=BK&PartNumber=8195592&Description=Lift+Supports+-+Universal+Gas+Charged). It's an exact replacement for the shocks. Attributes: Compressed Length:12.00". Extended length:20.00".

You'll need a pair of Gas Spring 90 degree; Mounting brackets, (sold in pairs) (Overton's Part Number 33613 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&item_num=33613&fcat=2C7C)). These are the ones mounted to the floor with the nub facing inward.

You'll also need a pair of Gas Spring Flat Mounting brackets (sold in pairs) (Overton's Part Number 74273 (http://www.overtons.com/modperl/overtons/detail/pdetail2.cgi?r=detail_view&merchID=1006&item_num=74273)). These are the ones mounted to the inside of the motor box.
Eastie, How far does your engine cowling open with the gas struts? Right now on my 91 Prostar we open the cowling until it rests on the rear seat and it allows plenty of room for engine maintenance.