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View Full Version : 1990 Prostar 190 Exhaust tips


T'sProstar
10-31-2013, 05:36 PM
Does anyone know if these bolt on and if I need to know anything before attempting this install. Thanks

Exhaust Tips (http://www.ebay.com/itm/Stainless-Steel-Marine-Boat-4-exhaust-tips-Angle-Cut-Polished-No-flap-/261075461520?pt=Vintage_Car_Truck_Parts_Accessorie s&hash=item3cc94f6590&vxp=mtr)

clrussell
10-31-2013, 06:09 PM
I believe they are screwed/ glued on. 3m makes a glue/sealer I'm pretty sure. There's a few threads on how people have changed them. Maybe someone can post a link for ya. Or just search for exhaust tips

T'sProstar
10-31-2013, 06:17 PM
ok great Thanks

I just wanted to make sure it was something simple so I don't sink

Laurel_Lake_Skier
10-31-2013, 09:19 PM
I changed mine out for stainless last winter....and from the looks of those in the link, you'll want to find some others with a bolt pattern that matches up with what you have.

Once you have the ends that match, you'll have a bit of a wrestling match getting the exhaust hose free of the old ends. After the hose is off, the tips will need to be loosened from the hull and the hull cleaned of the old sealant. To put the new tips in, lay a bead of sealant around/in the hull opening, insert your new ends and replace the screws. Reconnect the exhaust hoses, let the sealant cure and check for leaks prior to spending a day on the lake.

T'sProstar
11-01-2013, 09:36 AM
ok Great and recommended sealant? How long is the process for a TT Newbie

Thanks again

corey
11-01-2013, 01:36 PM
It's pretty tough to find exact replacements for a 1990, right now we are using this one http://www.skidim.com/prodinfo.asp?number=SSI03-3109090 for the 3" exhaust.

thatsmrmastercraft
11-01-2013, 01:39 PM
Does anyone know if these bolt on and if I need to know anything before attempting this install. Thanks

Exhaust Tips (http://www.ebay.com/itm/Stainless-Steel-Marine-Boat-4-exhaust-tips-Angle-Cut-Polished-No-flap-/261075461520?pt=Vintage_Car_Truck_Parts_Accessorie s&hash=item3cc94f6590&vxp=mtr)

Those are 4" tips. Pretty sure your tips are smaller than that.

drschemel
11-01-2013, 06:06 PM
just out of curiosity, don't you need the flaps on the exhaust? What happens if you don't have any? Wouldn't water run backwards through the exhaust and fill the manifolds when you are backing up and the motor stalls or you killed it too soon? They look pretty on the trailer, but I can't really see my exhaust flanges when my boat is in the lake!

strad
11-01-2013, 06:20 PM
just out of curiosity, don't you need the flaps on the exhaust? What happens if you don't have any? Wouldn't water run backwards through the exhaust and fill the manifolds when you are backing up and the motor stalls or you killed it too soon? They look pretty on the trailer, but I can't really see my exhaust flanges when my boat is in the lake!

My guess would be that the answer is something along the lines of water seeks its own level. In other words the water will not rise higher inside the exhaust system than the water line of the boat. Provided of course that there's no way for the water to get "in" and flow to the bottom of the bilge. In that case the boat will keep getting heavier,displacing more water, and "sinking". Lol.

Double D
11-01-2013, 07:37 PM
I did an entire thread on putting them on my 205. Do a search for Exhaust Tips and it's all in there. Good luck!!

See mine below.

102750

Table Rocker
11-01-2013, 07:42 PM
Water will not come above the waterline of the boat unless it has the momentum to do so, like shutting down coming off plane. I'm sure we have all seen water come over a transom on one boat or another.

You want flaps on your exhaust. It doesn't take that much water to hydrolock your engine.

Waterskibum
11-05-2013, 02:04 PM
So you definitely do not want 4" tips. Your factory exhaust is 2.5". There is a thread on here from 2006-2007 when I did mine. I upgraded my LT-1 exhaust manifolds to new MCX ones with 3" exhaust and new S/S tips. We had to cut the transom holes bigger for the tips, and re-drill the screw pattern, and then sealing with marine grade sealer like 5280.
Would not say this is for the faint of heart, and was glad I had people helping me. You could really screw your boat up.

Double D
11-06-2013, 02:22 PM
I did an entire thread on putting them on my 205. Do a search for Exhaust Tips and it's all in there. Good luck!!

See mine below.

102750

OK, back from vacation and thought I would follow up on this thread. Not much activity and a few concerns and don'ts have been added. I found my thread which explains the difference in sizes since there was some concern with the 4" tip. Going with a smaller tip doesn't provide a good flange size.

Check it out here: I had a big push from Kyle at the end there so thanks for him for getting me motivated.
http://www.mastercraft.com/teamtalk/showthread.php?t=34233&highlight=Exhaust+Tips

Also the concern about back flow. I have had these on for a season and have not changed my driving style and have had no issue with no flaps.

Once again, if you decide to proceed, let me know if you have any questions.

Table Rocker
11-06-2013, 02:26 PM
OK, back from vacation and thought I would follow up on this thread. Not much activity and a few concerns and don'ts have been added. I found my thread which explains the difference in sizes since there was some concern with the 4" tip. Going with a smaller tip doesn't provide a good flange size.

Check it out here: I had a big push from Kyle at the end there so thanks for him for getting me motivated.
http://www.mastercraft.com/teamtalk/showthread.php?t=34233&highlight=Exhaust+Tips

Also the concern about back flow. I have had these on for a season and have not changed my driving style and have had no issue with no flaps.

Once again, if you decide to proceed, let me know if you have any questions.I think the baffles on yours provide similar surge protection that flaps would. When I referred to no flaps, I was referring to open tips.

Lumbergh
11-06-2013, 06:12 PM
Pre 1995 (1994 and older) Prostars used 3" flanges. In 1995 they went to 3.5 or 4" flanges.

The poly flanges that were exact fit are NLA.

I used these:

http://www.waterskis.com/250021-p/exhaust_flange_3_inch.htm

Pricey, but buy once-cry once IMHO.

I was not about to start cutting into my hull just for new flanges:

Money shot:

http://i470.photobucket.com/albums/rr66/Lumbergh556/DSC01309800x600.jpg (http://s470.photobucket.com/user/Lumbergh556/media/DSC01309800x600.jpg.html)

Forgive the awful pinstripe, it's gone now. The rubber flappers are removed for the picture.

Skidim sells a poly and a SS flange in the 3" diameter, but not with the exact 8 holes for the MC hull.

mikeg205
11-06-2013, 11:25 PM
Pre 1995 (1994 and older) Prostars used 3" flanges. In 1995 they went to 3.5 or 4" flanges.

The poly flanges that were exact fit are NLA.

I used these:

http://www.waterskis.com/250021-p/exhaust_flange_3_inch.htm

Pricey, but buy once-cry once IMHO.

I was not about to start cutting into my hull just for new flanges:

Money shot:

http://i470.photobucket.com/albums/rr66/Lumbergh556/DSC01309800x600.jpg (http://s470.photobucket.com/user/Lumbergh556/media/DSC01309800x600.jpg.html)

Forgive the awful pinstripe, it's gone now. The rubber flappers are removed for the picture.

Skidim sells a poly and a SS flange in the 3" diameter, but not with the exact 8 holes for the MC hull.

$240 - that's not cryin' money ;)

Lumbergh
11-07-2013, 10:46 AM
Considering the 95+ OEM poly flanges cost $15/ea, I would say that the SS flanges at $120/ea are a bit pricey.

I would have just done poly if they were still available anywhere in the correct 8 hole pattern...

Love spending money on my boat, sometimes you have to bite the bullet on doing things right.