Tohatsu

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Added 02/17/04

I have considered buying an 8 hp Tohatsu outboard motor for my C26 MKII.  Does anyone have any experience with these motors?  The price is good and they are light weight.  The down side is that there are not very many dealers in the DFW area.  I would appreciate any opinions.

Frank Schenk

 

I have the 3.5 hp model on my dinghy (8.5 footer) it has been a great engine.  Carried it all summer in a quarter locker on inside.  Worked every time I mounted it.  Nice and light but you have to mix the gas right!

Dennis C-27 #271
The Dutchman
Bay City MI

 

Stew:  Is the noise from the exhaust or from the engine?  If it is from the engine perhaps a little insulation in the cowl would reduce the noise.  Can you talk to each other at full throttle?  I only run my engine for about 1000 ft to get away from the marina so I may be able to live with a little
noise.  Thanks for the information.  I will check it out before I make the purchase.
Frank Schenk

 

Steve:
I made the plunge today and bought a 9.8 hp Nissan which is the same as a Tohatsu except for paint and name.  Tohatsu also builds many Mercury's.  I chose the 2 stroke cycle long shaft which only weighs about 65 pounds and sells for $1650.  The 4 stroke cycle weighs about 100 pounds and sells for about $1800 in our area.  I am hoping that my existing bracket is strong enough so I do not have to spend another $150 for a stronger one.  Everyone I have talked to said that the Tohatsu is an excellent motor with few if any repairs.  I will post a message after I have installed the motor and checked
it out.


Frank Schenk
C26 MKII

 

Today I picked up my Tohatsu outboard motor that I purchased 10 days ago.  The Dealers in the Dallas/Fort Worth area do not keep them in stock and have to pick them up from a warehouse.  Part of the delay was that the dealer was busy at the Dallas Boat Show.  My first question is on the wire gage for the starting motor.  The wire on the motor appears to be about 8 gage and is not long enough to reach the battery on my C26 MKII.  The total distance from the motor to the battery is about 15 feet max. with about 6 feet already on the motor.  What minimum gage wire is required for the starting motor for a 9.8 hp outboard?  At present I only have one battery because my previous 6 hp outboard was manual start.  Should I install a second battery just for the outboard?  The present battery is only used for lights and I only sail for about 4 to 5 hours at night. 

My second question is on the break-in procedure for a new outboard motor.  The dealer recommended I use a 30 to 1 mixture in the first gallon of fuel and run at about 1/2 throttle.  I would appreciate any suggestions from the august body of men and women who post at this web site.  PS, I heard that flattery will get you every thing.

Frank Schenk

 

 Hey Fred,

You have to figure that 15', (after you run the wire around bends etc.) makes for at least a 30' round trip.  That's a pretty fair amount for the sizable amperage loads of a starter.  I personally erred on the side of heavier rather than lighter, so I ran 4 gauge from my dedicated starting battery (an AGM Jet Ski battery) to a pair of those round distribution blocks (they look like a bolt embedded in some plastic - West sells them) where I join the leads from the motor (Yamaha 9.9 4 stroke).  I used 3/8" stud for positive and 5/16" stud for negative.   I bolted the distribution blocks underneath the cockpit combing, and secured the leads using
stainless cable clamps (2 @ each point, on opposite sides of the bolt, carrying Neg.
& Pos.) bolted onto the exposed ends of the 1/4" Genoa Track bolts.  In the winter when I have to disconnect the motor, I simply slide down into the lazarette, unscrew the two distribution-block bolts (after disconnecting
the 125 amp fuse @ the battery), and the cable is free.  I ran it through a small hole the transom, (just below the Hull/Deck Joint) which has a 60 Degree, 1" rectangular "tubing Base plate" (the kind you use for pulpits & stern rails) fastened and bedded to the outside of the transom.  Gives it
a nice finished look, and makes it a bit more rain proof.  I think you could alternately use a quick disconnect (instead of the Distribution blocks)
from an automotive winch hookup, but quick disconnects on a critical junction like that make me nervous.... I would definitely have a dedicated starting battery, and a 75 amp West "Battery Combiner" connected from your starting batt. to your house battery.  My house bank is an AGM, 200AH unit, and the combiner works
great. I never have to remember to throw (or not to throw) a switch to make sure
I am getting charge to my house bank.  You should also make a provision to parallel the two together in case your starting batt. goes flat. As far as the break in stuff, I have always heard that you should double the normal premix amount during break in.  Also, most manufacturers say that you should not run the same RPM continuously for any length of time, so you want vary your engine speeds for the first tank of so.  I
have also been told that running above half throttle is not a bad thing so long as the engine is up to temp.  Supposedly this allow the pistons and rings
to seat and scuff to their full excursions.  The experts on this site can probably tell you a whole lot more. BTW, are you using a portable or a permanent fuel tank? Good Luck Fred.

Mark "I am now officially sick of winter" Patullo
'72  C26MKII
Great Blue

Mark:  Thanks for the info on the wiring:  I talked to an electrical engineer and he said that 6 gauge wire would be adequate.  I like the idea of using a distribution block for quick disconnect.  We had about 4 inches of snow yesterday so I am waiting for it to warm up before I do the installation.  The second battery project will be done later.  I use a 3 gallon portable fuel tank which will last for several months.  I only have to motor about 1000 feet to get out of the Marina..


Frank (not Fred) Schenk

Frank,

If you are going to keep fuel around for that long - add some Sea Foam to the tank.  It will keep the carb from gumming up from limited use too.

stephen

 

The snow has melted and it warmed up to about 55 degrees today so my sailing buddies and I installed the new Tohatsu motor today.  The hardest part was running the wires from the battery to the leads (pig tail) on the motor.  Since I am the smallest I have to crawl into all of the tight spots.  We motored around for about 30 minutes to check out the motor.  The 9.8 hp appears to be more than adequate.  It was quieter than expected and idled at a very low RPM.  I want to thank everyone again for the information.  BTW I talked to another Tohatsu owner who said that the only maintenance on his 10 year old motor was the impeller for the water pump.

Frank Schenk
C26 MKII

 

Is your motor a two cycle?  And the one you spoke of by the other motor
owner, is it a two cycle also?

 

Frank -
I have been considering a new motor for my Columbia 23.  I have checked all the marine engine places in Pensacola, and the Tohatsu appears to be the better buy for what you get.

BUT, when I check all the engines, I see a very small prop - the current Chrysler 6 Sailor (obviously it has problems or I wouldn't be looking) has a HUGE prop by comparison.

I know your boat is much larger than mine, and you probably aren't concerned with having to remove it after a day's sail, but am I correct in stating that the weight is about 80-90 lbs, and a 9.8 comes with a 'high thrust' prop?

Have you had any experience in using the smaller hp rated (like 5 or 6) Tohatsu's?  Or know of anyone who has?  I think the added weight of the 9.8 would only push the stern down in the water, not through
the water faster.  And the weight wouldn't help either.

Last question - why choose a 4 stroke over a 2 stroke?  I've heard many different arguments why one is better (aside from pollution).

Any comments?

Charles Bourne
Pensacola, FL

 

For a sailbioat outboard engine, you should  always see if there is a "workboat prop" available. It has a lower pitch than the standard prop and will push your boat better, especially if there´s a bit of a "popple"
john
pampero iv

 

Steve:  My new motor is a two cycle and his old motor is a two cycle. 
Frank Schenk

 

Charles:  Tohatsu has about four different props available.  Without any data I just accepted the prop that comes with a 9.8 hp long shaft motor. It has a low pitch but is not the lowest pitch available.  The idea is to get the maximum rpm at full throttle.  I would have to get a tachometer to determine if my prop is correct for my boat.

My motor weighs about 65 lbs.  I think the 15 inch (short shaft) manual start is about 57 lbs.  The 8 hp is the same weight as the 9.8 hp.  A 9.8 hp four stroke Tohatsu is about 90 lbs and a comparable Honda or Yamaha is about 115 lbs.

I chose the two stroke over the four stroke because of weight.  It also cost about $200 less and I could use my existing motor bracket.  A new bracket would cost $159.95 so I saved about $360 plus 6.25 % tax.  I think a 6 hp motor would be more than adequate for a Columbia 23 and should weigh less.

I am told that two stroke motors are more reliable than four stroke motors but I do not have any hard data to support this opinion.

Frank Schenk
C26 MKII