Tohatsu 25hp to 30hp worth the trouble?

[papadave]

I have a 1989 Carolina Skiff 1450 with an '89 Tohatsu m25c2(tiller) and a SE 2000 Hydrofoil installed. With just me (and all the gear) at around 3/4 throttle I hit around 20mph and it sips fuel. WOT zips along pretty well, but sucks fuel. With 1 fishing partner along (2 of my 3 fishin buddies are 225+) the1/2 - 3/4 throttle is pretty slow, at WOT top end is acceptable, but it'll drink almost a 6gal tank in a 25 - 30 mile day. BTW, loaded or not it pops on plane in 2-3 seconds.
I'm sure I'm just about maxin' out the weight for the hull, but it's what I have, and I doubt I can talk the guys into dropping 50 - 100 lbs.

Is it worth converting the 25 to a 30? Will I notice enough diff in speed at a reasonable throttle without overly increasing fuel consumption?

 

[pvanv]

Re: Tohatsu 25hp to 30hp worth the trouble?

It will give you some more... of both... some top end (maybe 3 mph) and will indeed burn more fuel doing it.

 

[Sea Rider]

Re: Tohatsu 25hp to 30hp worth the trouble?

The conversion is very easy, fast and extremely cheap, just change carb gasket for the 30 HP model if having restricted metal gasket air entrance and add 5 ? more timming if having 20?, to have 25?, play with stopper A to have butterfly at 180?, will have 5 HP more at throttle's end with better hole shot punch and increased top end speed, but definitely will increase fuel consumption at wot. This modification is for 25C3 engines, probably 25C2 is timmed differently, a matter to check.

Factory specs consumptions at wot: 25 HP, 3.30 Gl/Hr : 30 HP, 3.96 Gl/Hr with standrad prop. To obtain the best boat/engine performance perform a wot test. Nobody sane cruises always at full wot.

Happy Boating

 

[papadave]

Re: Tohatsu 25hp to 30hp worth the trouble?

Thanks guys!