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View Full Version : 99 Sportstar has me scratching my head


tg190
05-11-2011, 11:29 AM
New to forum, but have been addicted to the many ongoing threads in here...hoping someone will be able to help me out.

I bought a 99 Sportstar last year as somewhat of a project. Everything looked sound mechanically and seemed to run well but it was in need of some tlc.

I decided not to put it in the water until i went through everything to ensure it will not cause me grief...so I thought I would replace all the cooling hoses that seemed a little tender. Replace the thermostat, as the original one was pretty rusty. I thought the manifolds and risers looked to be in great shape but decided to take off one riser to see how things looked. Everything looked great but what I found when I removed the riser from
the 3.5" Exhaust hose was that the riser was a 3" with a short piece of 3" hose as a spacer. Can anyone tell me if this is standard from MC or has somebody replaced the 3.5" riser with a 3" riser...I would think that the 5.7L would use the 3.5" riser but I cant find anything to prove this.

Thanks

tph
05-11-2011, 12:17 PM
I think the SportStars had the 305 Cu in. engine instead of the 350. Maybe the 305 uses smaller hoses.

tg190
05-11-2011, 12:53 PM
In previous years, yes they did but in 99 they had the 5.7 efi...not vortec though. Im not so concerned about the hose size as i am about the riser. Thanks

tg190
05-11-2011, 03:51 PM
I'll try to post a pic tonight...my explanation may be confusing

tg190
05-12-2011, 10:08 AM
http://i1126.photobucket.com/albums/l604/tg190/carddumpMay11260.jpg
http://i1126.photobucket.com/albums/l604/tg190/carddumpMay11258.jpg
http://i1126.photobucket.com/albums/l604/tg190/carddumpMay11257.jpg
So it looks to me like everything from the risers back is factory issue from MC but the actual risers with the the little chunk of 3" hose looks fishy. I am thinking that i need to order a set of 3.5" risers but I can't find confirmation in the Indmar manual. Any help would be appreciated.

Thanks, tg

DemolitionMan
05-12-2011, 10:19 AM
Have you talk to the guys over at www.skidim.com? They should be able to help you out.

tg190
05-12-2011, 11:31 AM
Havn't talked to anyone but have gone through the site...its says 94 and up use 3.5" riser which would make sense to me.
Thanks DMAn

robin
05-12-2011, 02:55 PM
Nice boat. i have a 99 sportstar as well and love it. just for your information, the standard engine for it was a 350 indmar TBI, 310 hp, with vortec heads. this is what mine has and it was the standard engine. no 305 was offered in 99. the only other engine option for the sportstar was the ltr MPI engine. from looking at your photo, i can see your raw water pump has been replaced. the OEM exhaust manifolds had a bold "mastercraft" on them, not indmar. my risers are also 3.5, and have no such reducer as yours. if you want, i can take a pic of mine in the next couple of days and let you see......its exhaust is still oem

tg190
05-12-2011, 04:59 PM
Thanks Robin, its not in the shape I would like it to be in just yet but getting there...so do you think that it is a likely scenario that the previus owner replaced the water pump, manifolds and risers, but put the wrong risers on?

Here is what Vince at Skidim had to say....
The foot print of both risers is the same. You could run either one, and not see any difference from a performance standpoint.
It's a little strange he would switch to a 3", unless he changed mufflers & hose, or put an adapter in line. According to our records, it appears Indmar went to 3 1/2" risers around 1994.

Thanks,

Vince Dougherty
www.skidim.com

Have to give him a shout out for the super quick response.
Robin, if you want to send me a photo of yours for comparison that would be stellar.

Later, tg

robin
05-12-2011, 06:00 PM
i will take some photos of the engine in the next couple of days when i go and get the boat. Vince has a good rep and if he said it should work ok, it should. i guess i would put her in and run her and see if it affected the performance before i would decide to buy 3.5"ers and put them on (depending on your budget). just for reference for you, mine with a acme 541 prop will do about 46-47 mph right at the rev limiter at 4700 rpm, and she gets there real quick too. the sportstar 19 is a relatively small boat with 310 hp, and running right it should scream.

tg190
05-12-2011, 10:21 PM
sounds great...looking forward to working out all the headaches and getting some skiing in. I'm not sure what my prop is...4 blade but not sure of the pitch.

Looking forward to seeing your pics

Later, tg

tg190
05-13-2011, 08:31 AM
Robin, one more question...when determining the rotation of the engine, do you stand facing the pulleys and determine if the crank rotates clockwise or counterclockwise? If it rotates clockwise that would be considered RH rotation...right?

DooSPX
05-13-2011, 08:37 AM
MC's and every other ski boat except for SN is LH rotation. SN's are RH rotation.

tg190
05-13-2011, 09:01 AM
Thanks DooSPX..

DooSPX
05-13-2011, 02:57 PM
No prob.
Thats a good looking boat you have there. Now, get her back together and hit the water!

tg190
05-15-2011, 10:05 PM
thanks a bunch...ice just left the lake on May 3 so i have some time.

robin
05-22-2011, 07:31 PM
sorry it has taken so long, but here are some pictures of my engine. it has been lousy weather here in northern indiana, and i finally got it in the the water today....the latest ever for us.

robin
05-22-2011, 07:32 PM
here it one more. i had six, and it appears you can only upload 5 at a time.

tg190
05-26-2011, 04:44 PM
Thanks Robin, I definitely see some differences with your motor package. Good looking craft!!

Thanks, tg

robin
05-26-2011, 05:56 PM
Hope the pics help.....let me know if you need anything else for compairing

tg190
06-02-2011, 09:20 AM
Robin, obviously I am missing the plastic shroud that covers the intake manifold. Any idea where this could be purchased?
Also, I am missing the hydraulic dampeners on the motor box...can you tell me what length I need to buy?
Thanks!!!

TxsRiverRat
06-02-2011, 09:43 AM
OK, so... What difference does it make if it's 3 or 3?

robin
06-02-2011, 11:29 AM
you will need 4 gas shocks for the clam shell engine cover. the attwood part # is sl-31-120

i have bought mine from back to boating. com

http://www.backtoboating.com/Scripts/prodView.asp?idproduct=32

they are $28.57 each right now.

as far as the 3" or 3 1/2" really making a diffence, i'd love to here enginenut chime in.

for the decorative engine shroud, i'd try some of the dealers that surf here, like BAWS or Rambo marine

tg190
06-02-2011, 02:15 PM
once again, much appreciated...not to concerned about the shroud but it does look alot cleaner under the motorbox with it on.
i decided to remove all the vinyl last night and have it re-skinned...probably just replacing to match original colors and design. Also tore out a poorly installed audio system as it was just added weight in my opinion.
I'll take some picks tonight and post them.

Cheers!

tg190
06-02-2011, 02:34 PM
OK, so... What difference does it make if it's 3 or 3?

Well, according to Vince at Skidim...not much difference.

I would think that the 3 1/2" would perform slightly better??

TxsRiverRat
06-02-2011, 02:51 PM
I would think that the 3 1/2" would perform slightly better??

That's what she said


LOL

robin
06-02-2011, 02:57 PM
if you are replacing the skins, you have to post before and after photos...unwritten rule.

tg190
06-02-2011, 04:05 PM
That's what she said


LOL

Bahahahaha!!!!! i am going to start reading my posts a little more closely...afraid to ask about any shaft issues,,,ie bent, wet, broken, loose, rusty............

tg190
06-02-2011, 04:07 PM
if you are replacing the skins, you have to post before and after photos...unwritten rule.

10 4...they'll be sitting on the floor, hope thats good enough

tg190
06-03-2011, 11:28 AM
A few pictures of the original seats on their way to Arctic Canvas in North Bay,ON.

http://i1126.photobucket.com/albums/l604/tg190/IMG_8211.jpg[IMG]
[IMG]http://i1126.photobucket.com/albums/l604/tg190/IMG_8213.jpg
http://i1126.photobucket.com/albums/l604/tg190/IMG_8212.jpg
http://i1126.photobucket.com/albums/l604/tg190/IMG_8217.jpg

I might add a little more black to the color scheme. I would like to clean the carpet while everything is out of the boat...what is the best type of carpet cleaner??

Later, tg

robin
06-03-2011, 11:35 PM
I have a bissell steam cleaner i use on the carpet. I just use the bissell detergent, and pretreat real bad areas w a a spot cleaner. My carpet is gray and shows dirt, but it cleans easy. When you re-carpet, you may consider black....it seems a either love hate thing w black carpet, but i think it would look sharp in yours.

tg190
06-05-2011, 06:58 AM
good call on the steam cleaner...i was planning on doing some scrubbing but thats sounds way easier.
i like the black carpet...living in Northern Ontario i dont really have to worry about it gettinng too hot.

next winters project maybe....

vrsc
03-25-2012, 05:32 PM
you will need 4 gas shocks for the clam shell engine cover. the attwood part # is sl-31-120

i have bought mine from back to boating. com

http://www.backtoboating.com/Scripts/prodView.asp?idproduct=32

they are $28.57 each right now.

as far as the 3" or 3 1/2" really making a diffence, i'd love to here enginenut chime in.

for the decorative engine shroud, i'd try some of the dealers that surf here, like BAWS or Rambo marine

could you post a pictures of where your 2 lower carpeted engine cover gas shocks connect. on mine, these shocks are missing but still have metal ball socket part attached to the carpeted area but I can not see where they attach to. thank you

robin
03-25-2012, 07:29 PM
OK,
I will try and remember next time i go to my boat. I have a pyle of parts stacking up to put on when i spring clean / detail her. Ought to be in the next week or so.

vrsc
03-26-2012, 11:56 AM
Thank you very much