Hi guys

[Igetwet]

Hi guys, been a lurker for a while but finally registered recently. Been a boater my whole life. Was raised on a 1984 17’ monark with a 140 evinrude VRO. Many years later, I’m passing the passion onto my 7 and 11yr old kids. Wife has been a boater her entire life as well. We have been incredibly blessed and have been able to own several jet boats, jet skis, and I/Os, but haven’t owned a O/B yea, where it all started.

Of course, like many it seems, I’m looking for a grand sport. I think one would be the perfect compliment to our Donzi 38 ZR. We take great care and pride in our vessels (refer to the donzi as my side piece, wife loves it), so if someone is thinking of selling, rest assured it’d be in good hands.



If anyone knows of anyone in the market for an extremely fun seadoo jet boat let me know. Twin 255hp.

 

[ROBERT CROSS]

Welcome Aboard...good luck with your search.
Bob & Sandra

 

[Igetwet]

Brought the 2016 GS Will1993 was selling home on Friday. She’ll get a deep cleaning, probably a couple touchups some rigging clean up and then hopefully by then it’s warmer out!

 

[wcarlyle]

Good looking boat. Congratulations. Man that motor is massive on the back.

 

[Igetwet]

Thanks.

Yes it is big and the boat overall is tiny compared to what we’re used too. The plan was to find a 2.5 merc, but I grew impatient and do like the idea of turn-key, clean and a warranty until 7-2026!

 

[ROBERT CROSS]

Welcome to the Allison Club....GS Wing.

 

[wcarlyle]

You will love the boat. It is small, but so cool and very fast. Let us know how it performs with that motor. I would keep looking for a good 2.5 to lighten it up, then you would have the perfect set up. Be safe and wear your lifeline jackets.

 

[Allyfishing]

Wow you really found a winner. Looks immaculate. bit unchartered territory with a stock gearcase Yamaha SHO 250. I don't know much about the Grand Sport as far as engine height but I do know you need to be careful with that gearcase. I'm assuming you know all about "prop to pad" measurements so be sure to get those numbers as near perfect as you can. Stock lips on most earlier Allisons called for even or barely above the pad running. Hopefully more GS guys with experience will stop by and offer solid advice.
Welcome!!

 

[Igetwet]

Yea I know before I get too serious I will have to get the lower coned with good low water pickups. The water pickups on this lower are pretty much on the sides of the bullet.

 

[Igetwet]

Long shot, but anyone have a spare sea star HO5116 - 16’ hose they have laying around? Otherwise I will have a spare soon. They only sell in pairs

 

[wcarlyle]

You might want to put a post on Scream and Fly in the parts wanted section. Reaches a lot of people.

 

[pkstv]

Long shot, but anyone have a spare sea star HO5116 - 16’ hose they have laying around? Otherwise I will have a spare soon. They only sell in pairs

Sell that motor before you get hurt !

 

[wcarlyle]

Yep, I agree.

 

[Igetwet]

Lol. I heart you too man. Are you going to keep me stocked with 200xs parts for the life of this boat?

Wait, can you get me a 200xs or something similar first? I have other toys I’m constantly wrenching on.

PS. I had the wrong part no. It’s actually HO8216. Sea star pro hose and has the thru hull fitting on it.

 

[Igetwet]

The hose was kinked from install.

 

[pkstv]

The hose was kinked from install.

Find you a nice low hour 2.5 mercury or mariner promax 225 with a sport master lower unit and be done with it . They last forever with low maintenance!

 

[wcarlyle]

The Allison is like no other boat you have ever driven before. It will hook on you and you will be swimming in the blink of an eye. The Yamaha is way over the maximum weight limit for the Grand Sport, it is just too heavy and I am not sure you would ever get it set up right. I would recommend speaking to Bill at Allison Boats to get his take on it. That is a great boat, if you look you can find a good 2.5 to power it and have it set up right. Safety first, always.

 

[wcarlyle]

There is a Gen 2 200XS with 20" mid that was just posted on Scream and Fly for sale if you want to take a look. Great choice for the Grand Sport. Sell that Yamaha and you would have your boat set up the way it should be.

 

[scj]

A couple of things about the SHO you really need to know; it needs solid mounts installed as the stock rubber ones are too soft. This requires removing the powerhead. The lower gear case has too much lift and will blow out in the low 80’s on that little boat. You need to talk to Wayne at Hydrotek about setting that engine up properly. He’s the best resource for all things Yamaha outboards and making them safe and fast. Me personally, I love the SHO with a 3 liter sportmaster gear case mated to it. There’s a guy on BBC selling a Hydrotek modified mid and 3 liter sportmaster for $6k

 

[wcarlyle]

A couple of things about the SHO you really need to know; it needs solid mounts installed as the stock rubber ones are too soft. This requires removing the powerhead. The lower gear case has too much lift and will blow out in the low 80’s on that little boat. You need to talk to Wayne at Hydrotek about setting that engine up properly. He’s the best resource for all things Yamaha outboards and making them safe and fast. Me personally, I love the SHO with a 3 liter sportmaster gear case mated to it. There’s a guy on BBC selling a Hydrotek modified mid and 3 liter sportmaster for $6k

Great information and excellent recommendation. I just don't know how you get around the fact the motor is 130 lbs too heavy for the Grand Sport maximum weight unless those mods take that weight off somehow. I would not drive it like that.