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-   -   Propane Dinghy Motor?? (https://www.trawlerforum.com/forums/s20/propane-dinghy-motor-10294.html)

beachbum29 05-26-2013 11:35 AM

Quote:

Originally Posted by SCOTTEDAVIS (Post 159005)

Your are right I did, thanks.

Now it works

I see the price of these coming down in the future, if they go to E15 fuel then these will be very popular and in larger HP ratings for marine use.

Ethanol & water is a bad mix.

Conrad 05-26-2013 04:54 PM

We considered the 9.9 recently, but after doing the fuel calculations decided to get a Yamaha instead, which was within $20 of the Lehr. Our calcs suggested that a 5 HP Lehr would make sense from a fuel burn/storage perspective, but we needed the larger size.

Our dealer indicated that the Lehr is actually primarily made of Yamaha components, which I thought interesting.

beachbum29 05-26-2013 04:57 PM

Quote:

Originally Posted by Conrad (Post 159036)
We considered the 9.9 recently, but after doing the fuel calculations decided to get a Yamaha instead, which was within $20 of the Lehr. Our calcs suggested that a 5 HP Lehr would make sense from a fuel burn/storage perspective, but we needed the larger size.

Our dealer indicated that the Lehr is actually primarily made of Yamaha components, which I thought interesting.

That wouldn't surprise me. You can buy propane conversion kits for many applications.

healhustler 05-26-2013 06:32 PM

Quote:

Originally Posted by beachbum29 (Post 159037)
That wouldn't surprise me. You can buy propane conversion kits for many applications.

True, but if you've looked at the Lehr, you gotta admit that it is tied together in a very nice, neat, compact package. I sure like the idea of grabbing a spare 16.5 oz bottle and heading for the dinghy dock. If I didn't have a good 9.9 Merc now, I'd probably have bought one from Hopcar at the Miami Boat Show.

Hopcar....I might take you up on your offer. A 2.5 should do anything we want to do with local cruising and the loop. For the islands, we'd probably go with a bigger dinghy and 15 hp. I've got a spare dinghy sitting on the dock now....could hook it up there for a test.

beachbum29 05-26-2013 06:38 PM

Quote:

Originally Posted by healhustler (Post 159044)

True, but if you've looked at the Lehr, you gotta admit that it is tied together in a very nice, neat, compact package. I sure like the idea of grabbing a spare 16.5 oz bottle and heading for the dinghy dock. If I didn't have a good 9.9 Merc now, I'd probably have bought one from Hopcar at the Miami Boat Show.

Hopcar....I might take you up on your offer. A 2.5 should do anything we want to do with local cruising and the loop. For the islands, we'd probably go with a bigger dinghy and 15 hp. I've got a spare dinghy sitting on the dock now....could hook it up there for a test.

Since I have to put anything I get on the swimplatform, a 2 person inflatable with the 2.5 should suit us fine.

Having only seen pics of the Lehr, I'm assuming it's a nice package.

123 05-26-2013 07:38 PM

Quote:

Originally Posted by SCOTTEDAVIS (Post 158997)
Umm.... somehow this math does not add up.


or my mental ratio calculator is broken

10 X 2.5 = 25
16.5oz X 10 = 165oz

1 gal is 132 oz

how many OZ is in a 10gal tank of propane?

can you refill from a larger tank to the boat tank?

like the unlimited storing of propane however

20 Gal = ~80 ltr
80 ltr = 40 kg of propane (~0.51 kg per liter)

165oz = 4.7 kilograms = ~2.3 Gal propane

HopCar 05-26-2013 09:01 PM

"Our dealer indicated that the Lehr is actually primarily made of Yamaha components, which I thought interesting."
Lehr won't say that but I also think a lot of it is Yahama. Someone asked what flusher to use with a Lehr and Lehr gave me a Yamaha part number.

"You can buy propane conversion kits for many applications."
True but I don't think a Lehr is just a converted gasoline engine. They are designed to run on propane and you would need to lower the compression to get them to run on gasoline. Propane has an octane rating of 110 so they run the Lehrs at a higher compression ratio than an engine designed to run on 87 octane gasoline.

Healhustler, maybe next weekend we could throw it on your dinghy and go for a ride.
Your hatch lift should be in by now. I'm taking tomorrow off but give me a call on Tuesday.

FF 05-27-2013 05:41 AM

I sure like the idea of grabbing a spare 16.5 oz bottle and heading for the dinghy dock.

Even better is the idea of taking the cylinder with you to increase the chances of your dink being at the dock when you return .

SCOTTEDAVIS 05-28-2013 06:46 PM

Quote:

Originally Posted by FF (Post 159103)
I sure like the idea of grabbing a spare 16.5 oz bottle and heading for the dinghy dock.

Even better is the idea of taking the cylinder with you to increase the chances of your dink being at the dock when you return .


+1 good point :thumb:

JCDSAIL 06-04-2013 07:53 PM

Lehr 2.5 Propane Motor
 
I just purchased this motor and after several hours of trying to start it finally brought back to West Marine for a refund.
I t seems there is a fuel regulator and a banjo bolt that need to be bled if it won't start.
After watching a trouble shooting video that seems rather odd for a new product. The video shows the 5 horse which is different
And after talking to Lehr tech I found these devices impossible to gain access to with a paper clip and or open end wrench.
So I can imagine trying to do this bleed process while sitting in the dingy.

Too bad I thought the propane fuel idea was super.


JCD SAIL

beachbum29 06-04-2013 08:29 PM

Quote:

Originally Posted by JCDSAIL (Post 160674)
I just purchased this motor and after several hours of trying to start it finally brought back to West Marine for a refund.
I t seems there is a fuel regulator and a banjo bolt that need to be bled if it won't start.
After watching a trouble shooting video that seems rather odd for a new product. The video shows the 5 horse which is different
And after talking to Lehr tech I found these devices impossible to gain access to with a paper clip and or open end wrench.
So I can imagine trying to do this bleed process while sitting in the dingy.

Too bad I thought the propane fuel idea was super.

JCD SAIL

I heard that the fuel system needs to be bled after purchase by the seller.

healhustler 06-04-2013 08:53 PM

Quote:

Originally Posted by beachbum29 (Post 160682)
I heard that the fuel system needs to be bled after purchase by the seller.

Yeah, I heard that from Parks (HopCar) who is a dealer. He acknowledged that it has to be done when first gassed.

beachbum29 06-04-2013 08:56 PM

Looks like I'm going to order one from him.

HopCar 06-04-2013 09:16 PM

When I sell an outboard, I always start it and make any needed adjustments before I give it to the customer. I sold Johnson and Seagull outboards for many years and we always did that.

jleonard 06-05-2013 06:12 AM

I looked closely at one they had at Defender in March. It looked well built. I think I would try one if I were in the market for a dink engine.

Codger2 06-05-2013 08:58 AM

Quote:

Originally Posted by jleonard (Post 160744)
I think I would try one if I were in the market for a dink engine.

:iagree:

FF 06-06-2013 05:59 AM

IF the dink is modest size , it is really easy to power with a DC trolling motor .Used is fine.

The huge advantage is the bride will not have to start an engine , just operate the throttle.

"Trapping" the bride aboard has been the termination of some cruisers dreams.

Baker 06-06-2013 06:48 AM

Quote:

Originally Posted by FF (Post 161073)

"Trapping" the bride aboard has been the termination of some cruisers dreams.

Trapping the bride aboard has been the beginning of some cruiser's dreams!!!

jleonard 06-06-2013 07:11 AM

Quote:

Originally Posted by Baker (Post 161084)
Trapping the bride aboard has been the beginning of some cruiser's dreams!!!

:rofl:

ancora 06-06-2013 11:01 AM

On our Memorial Day raft-up, my 27 year old 2 horse Mariner finally failed after three days of use. Got water intrusion into the head and seized up. As parts are no longer available I will have to find a replacement before our next raft-up in August. As weight is a factor, I'm lookin' at a 2.3 horse air-cooled Honda the lightest motor on the market for it's size.


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