18hp or 15hp ??

slate1234

Petty Officer 1st Class
Joined
Jul 1, 2012
Messages
210
Hi all I have a 12ft ribtec (hard bottom) I buying a new engine, tohatsu 18hp or yamaha 15hp both 2 strokes but the tohatsu is 41kg and the yamaha is 36 is 3hp worth the extra weight ??
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
You plan sitting and pulling OB out after use or maybe having the OB living sitting on transom ? 3 HP and 50 CC more are worth the extra weight. With a 18 will be able to carry more passengers and load along more fun. Will see any 15 HP left far behind....

A 18 will serve you well if in the future plan going for a larger rib. Imagine I'm boating with same 2 strokes18 with a 450 Rib intended for a 50 HP with 3 max up.

Happy Boating
 
Last edited:

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
You're welcome Slate.

That 2 strokes 18 has a third water intake right under Cav Plate, if lower side intakes are blocked with debris, algae at speed that third one will save you overheating badly your OB. Report back once installed on boat. Have lots of tips to better overall water performance.

Happy Boating
 

slate1234

Petty Officer 1st Class
Joined
Jul 1, 2012
Messages
210
No Title

The 18HP has arrived with new 2016 decals, I'm happy and can't wait to get out with it
 

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Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
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Congrats Slate, you'll love that OB. Used to have (2) 360 and 380 Sibs and with 2 up flew to Jupiter. Post pics when combo has seen water. Would advise to remove cowl and check that both cables comming from kill switch are properly inserted onto one another fully.

Happy Boating
 

slate1234

Petty Officer 1st Class
Joined
Jul 1, 2012
Messages
210
Sea Rider you 100% on the money, I love it I had a bit of transum splash, shimmed it up 1" and bingo, at 3000rpm it hops straight on the plane with me and my nephew, I am over the moon with it another 5 hours and its run in
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
Thanks Slate,

Post a nice pic of the combo, a 18 well transom height matched will top power anything that floats. Let's see if you have dialed the sweet transom/OB height. Wow, you have purchased an induction tach well in advance, thats perfect, will do some prop testing after break in period is over.

Happy Boating
 
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