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Author Topic:   87 13.1 sport performance
nven posted 04-02-2003 09:01 AM ET (US)   Profile for nven   Send Email to nven  
I bought a 13.1 sport with Yamaha 25 hp 2-stroke short shaft engine. I use it in salt water in Greece. The speed was ok with one person (adult) but with 3 (adults) very very poor. Unfortunately the Yamaha sized so I am thinking of buying a 30 Hp 2-cylinder long shaft. Will it be ok for 4 persons?
Bigshot posted 04-02-2003 10:00 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
If it requires a short shaft(old blue), you can't use a long shaft. 5hp won't do squat but a 3cyl 30hp would, just get a 40hp. PS they are 13'4".

brisboats posted 04-02-2003 06:36 PM ET (US)     Profile for brisboats  Send Email to brisboats     
Ti kanes?

If you get a great deal on the long shaft you can use it with a jack/standoff plate, but Bigshot is right it won't be that much difference with 5 more hp. However with the jack plate height adjustment and experimenting with props you may see a difference . Good luck.


nven posted 04-03-2003 01:56 AM ET (US)     Profile for nven  Send Email to nven     
Thank you all for your answers to my questions. As I can see you speak Greek also.
Unfortunately the short shaft is not suitable for the boat (as instructed by Boston Whaler), My boat is M.Y. 87 13.4 ft.
So I will follow bigshot view and buy a 3cyl 30 hp.
May the jack/standoff plate, be applicable for reverse use that is: to use short shaft engine instead of the proper long shaft?
Clark Roberts posted 04-03-2003 06:04 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
nven, if you install a jack or set-back bracket which moves engine back at least 5" you can use a 15" shaft motor on mounted at conventional height (on your 20" transom) and it will work well and have very shallow draft. I have done this on several 13's and one of them is shown on page 28 of Cetacea. Happy Whalin'.. Clark... Spruce Creek Navy
nven posted 04-03-2003 08:13 AM ET (US)     Profile for nven  Send Email to nven     
Thank you all for your kind assistance, I will sell the boat
Bigshot posted 04-03-2003 10:29 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     

What Clark said is you can buy a jackplate and use your current engine. Or you can buy a new engine in 20" shaft, no need to sell the boat.

nven posted 04-04-2003 07:35 AM ET (US)     Profile for nven  Send Email to nven     
thank you all,

but my story is sad, I do not have a car anymore because someone crashed into it and destroyed it and his insurance hasn't paid me yet (no trailoring ability. Second my engine (25 hp) needs new pistons due to overheating.
I am desperate I need engine and Car and I have no money.
Is there a Boston Whaler Fund?

Bigshot posted 04-04-2003 09:43 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Sure but we have to pay you in olives ;) My family is from Chios.
nven posted 04-09-2003 05:26 AM ET (US)     Profile for nven  Send Email to nven     
To bigshot: Why olives especially, any other product will be considered.

Regards to teh beautiful island of XIOS

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