Classic SeaCraft Community - 18' Superfisherman performance

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I am currently running a 2013 Tohatsu 90 TLDI in my commercial skiff. It replaced a 2003 Nissan (aka Tohatsu) 70 TLDI which developed a top-end knock at around 3500 hrs. Both motors got worked hard and put away wet, but never experienced corrosion issues. No gearcase problems, changed impellers annually. The 90 however had FI air compressor problems at 2400 hrs. which I blame on human error on the assembly line - nut securing drive sprocket loosened and stripped threads on crankshaft. When the 90 wears out, I'll probably replace it with a 4 stroke. The cumulative cost of 2 stroke oil was pretty much the same as the additional price of finance charges on a new 4 stroke. These engines require a big battery to turn them over cold. A group 27 is barely adequate. They need about 1000 cranking amps.

Quote:

Originally Posted by Beaver (Post 261036)

I agree with Fr Frank. Light is right. I have been running a 1992 Tohatsu 90on my 18 and I have been shocked at how well it pushes the boat. It planes quickly with two big guys in it and will run up to 32 mph. Average fuel consumption is 3 mpg. IÂ’m sure the Etec 90 is doing better than that.

If I was going to put a new motor on my boat, IÂ’d probably go with a Suzuki 90 or a Tohatsu TLDI 90.

Good luck

Wow. That’s good information. Thanks

Quote:

Originally Posted by mikeyk (Post 261044)

I'm running a group 24 Interstate on my F225 Yamaha, 800cca, 1000 mca and it cranks just fine.

Im currently running and 18 w 25" transom and df140 Suzuki. have the batteries forward in console and 30 gallon tank. 14x22 Suzuki prop getting 31mph at 4000. and 46mph at 5900.
a tad slow out the hole but not bad . weight on 140 isn't too bad . great set up

23 Seacraft df250

Took the boat on a long fishing trip, logging 129 nautical miles over a 9 hour day.
Leaving at 4:45 a.m. from Cinco Bayou in Ft. Walton, out Destin East Pass inlet then running east at about 4K rpms/25 kts to the Black Bart wreck off St Andrew's in Panama City. (Seas were almost completely flat, well under 1'}
Bottom fished for a while there for Mingo snapper.
Then on plane again for about 50 miles at 4400 rpms/28 kts before trolling the rest of the way at 5-6 kts out to the Edge 29 miles off Navarre where we caught a couple of out-of-season Gags in about 250' of water
Seas were now 1-2' so up on plane again at 4K to about 6 miles SW of East Pass, then trolled a couple of miles when we saw a big school of baitfish, pulling in a couple of medium sized dolphin (mahi) and an 8 lb Blackfin.
Then back on plane to the ramp, running about 24 kts this time, with a couple of minutes at about 90% throttle at 5K rpms 30-32 kts once back in the bay.

All told, 128.7 nm, and 22.4 gallons of gas burned, for an average of 5.75 NMPG, or 6.4 statute miles per gallon.

Man, I love this boat.

Good trip and better fuel economy!

I love mine too Frank. After seeing those numbers I think I’d love it more with an Etec 90. Over 6 mpg is just nuts.