Tohatsus Propane Engine Ups the Ante

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Just as we were wrapping up our small outboard test, Tohatsu introduced a 5 horsepower LPG motor into the mix. The new model competes squarely with the propane motors from Lehr that have been on the market since 2012 (see New Options in Small Outboards, PS January 2016.)

Targeted specifically to sailors, the Tohatu is based on the same powerhead found in the gasoline version, with a fuel mixer replacing the carburetor and a combustion chamber reshaped to suit the burn characteristics of propane. Unlike the Lehr, the Tohatsu does not operate with small, camp-style cooking cylinders, relying instead on a 10-pound composite tank, although almost any tank connected with a pigtail hose will work.

Tohatsu LPG model

Photos by courtesy of maker

The motor is available in 20-, and 25-inch shaft lengths and only offered in manual starting, which is markedly easier with a propane motor, since you don’t have to worry about bad fuel, ethanol contamination, or a balky carburetor. The Sailpro versions include a 5-amp charging system and a high-thrust prop. Unlike the Lehr, which weighs lighter than its gasoline counterparts, the LPG Tohatsu is about 4 pounds heavier than its gasoline-powered twin.

Tohatsu claims a 30 percent reduction in CO emissions compared to gas, but one of the main reasons we like propane is its immunity to fuel related issues. The main drawback to propane from a cruisers perspective is the limited LPG supply in some areas. That is improving, and since the engine is marketed primarily as small sailboat auxiliary, we don’t expect new owners to be heading out to remote areas where LPG is in limited supply. The engine carries a five-year warranty and retails for about $1,700.

Contacts
Darrell Nicholson
Practical Sailor has been independently testing and reporting on sailboats and sailing gear for more than 50 years. Supported entirely by subscribers, Practical Sailor accepts no advertising. Its independent tests are carried out by experienced sailors and marine industry professionals dedicated to providing objective evaluation and reporting about boats, gear, and the skills required to cross oceans. Practical Sailor is edited by Darrell Nicholson, a long-time liveaboard sailor and trans-Pacific cruiser who has been director of Belvoir Media Group's marine division since 2005. He holds a U.S. Coast Guard 100-ton Master license, has logged tens of thousands of miles in three oceans, and has skippered everything from pilot boats to day charter cats. His weekly blog Inside Practical Sailor offers an inside look at current research and gear tests at Practical Sailor, while his award-winning column,"Rhumb Lines," tracks boating trends and reflects upon the sailing life. He sails a Sparkman & Stephens-designed Yankee 30 out of St. Petersburg, Florida. You can reach him by email at practicalsailor@belvoir.com.

1 COMMENT

  1. We have had our Tohatsu 5HP propane outboard for 3 years. It is the hardest starting outboard I’ve ever owned. Following the instructions it takes 20 to 25 pulls to get it started when cold. Won’t idle until warm and that takes a while. When it’s warm all I have to do is look at the pull cord and it’s running. Sorry I bought it.