Moeller Marine Products Review

Update, April 2015. See bottom of post....Over the years we have often used Moeller Marine products, also sold under Tempo, and found them to be of fairly decent quality. But our most recent purchases have changed our opinion considerably. Here on the Beach House site we often post the specific product we are working with and links to where it can be found. When we use a product we like, it gets a good mention and we will often recommend it to others. But when we find a product we consider of poor quality we feel just as obligated to let others know of our experience. Three recent products made by Moeller have made our "Never Again" list. 

Each of these was purchased only a few months ago and only used a couple of times. The first is a pad that goes over the transom of our dinghy to cushion it when the outboard is mounted. This has only been used one other time with the outboard on and when we mounted the outboard again this weekend, here is the condition we found the pad to be in. It has split completely in half. The dinghy is mounted horizontally on our swim platform and it is impossible for anything to come in contact that might cause this problem.

The next is the premade fuel line that connects the outboard to the fuel tank. The squeeze bulb that lets you prime the line and the outboard is made of such a hard rubber material that you can't squeeze it to prime anything. You must virtually step on it to get the bulb to compress.

The hose itself is starting to collapse from the inside. We are always very careful not to crimp the hose but this one has already developed a crimp on its own, right at the end fitting. Also note the cheap crimped clamp on the end fitting since this too is a problem.

Both ends leak where the hose attaches to the end fitting connectors because the crimped clamp does not clamp down tight enough on the hose. You can easily spin the end connectors and if you can get enough pressure on the priming bulb the ends leak and will continue to leak when the engine is running and pulling fuel from the tank.

The biggest disappointment has been the brand new 3 gallon fuel tank that we purchased about a month ago. We use three gallon tanks for the dinghy so that the gas in the tanks get turned over quickly and we don't have to throw away bad gas, especially as expensive as it is now. The first time we filled up the tank and carried it down the dock we found it was leaking all over the place. Upon further inspection it was determined that the threads for the plastic cap that holds the pick up tube was split in half where the threads meet the mounting.

After disassembling the fitting, I used the handle for the pliers to hold open the split to show how bad it was. Note the other tank sitting next to the broken one. This older tank is a couple of years old and is also a Moeller tank. It has shown no signs of problems and continues to be leak free. I can only make the assumption that the manufacturing process has changed and quality control has gone down the tubes. The colors of the tanks are not the same further indicating to me that things have changed. Perhaps if it had been a single product we might have just taken it back for exchange. But three different products from the same manufacturer all failing in such a short period leads me to only one conclusion. We don't want this product on our boat. This time we will take the hit and reorder all three of these from another manufacturer. I invite Moeller to come on the site and comment on this if they care to.

Update...It only took 4 years but the folks at Moeller finally took notice of this post and responded. After several conversations over the phone, Moeller offered to send us replacements for the defective products. All but the transom pad for the outboard. According to Moeller, the manufacturing processes have changed on some of the products and the suppliers for the fuel jugs posted on their website have also changed. So we have agreed to give the products a second look with the understanding that if they also fail, we will report that here, as well as report the results if we get better results within the same time frame. So stay tuned, it may take a while to give these a chance to prove themselves. We'll certainly let you know.


  1. I also experienced the exact problem with a 12gal moeller tank after first season of use. I machined a nylon plug with o-rings to close the opening. I removed the fuel gauge and moved my fuel fitting to this fitting and this past season these threads also cracked. Paid $150 for the tank and now it's scrap. Very poor quality with a serious risk of fire hazard. Where is the UL/ CSA inspection?? Apr 14/14

  2. Good morning Chuck and Susan. My name is Mike and I am with Moeller Marine. I would like to discuss the issues you have listed further if you could reach back to me. Unfortunately the issues you are showing pictures of are old tanks and lines. You stated you have just purchased them but these have not been shipped from our factory for 3+ years and I would like to resolve this with you.

    1. Mike, This original blog post was written in 2011 so it has been out there since then. We also emailed Moeller about these issues with no response. As you can see in the comment above from April 2014, one visitor here had the exact same problem in 2014. We purchased two Moeller 5 gallon fuel tanks about 14 months ago because that was all that was available at the time and both have split wide open at the tops while simply sitting on our deck. Pretty scary for gasoline tanks. I'm not sure what you would like to discuss except why your products, designed to be used in the marine environment will not hold up. We have had this discussion with many, many other boaters and their comments have all been the same. Failure after failure of Moeller products. Our current outboard gas tanks are not Moeller made, they are Nissan labeled tanks, with almost 4 years of constant use, they were the replacements for the Moeller tanks, and they still look like new. No fading of the color and most importantly, no failure of parts or the tanks. So yes we would be happy to discuss this with you. Send me your contact information using the message widget that pops up in the bottom right hand corner of the blog and I would be happy to talk to you. Chuck

  3. I would like to reply to the statements above. I am with Moeller Marine and we strive to manufacture the best products on the market. I am happy to discuss any of these issues one on one if you would like. Over the past 5-6 years there have been many changes to the tanks, fuel line assemblies and fittings. These are due to the new EPA and CARB regulations and due to ethanol based fuel which is found in many parts of the US, etc. The pictures shown are of products that were manufactured prior to new materials and manufacturing processes that we now used. If an old style bulb (like the one shown) is used with ethanol based fuel or fuel often found in the islands and other countries, severe breakdown is going to happen. The rubber used to make the product cannot withstand the ethanol, etc. The fuel line was also not made for this and will not hold up. We have also had one bad run of hose since the new EPA rules went into effect that was pulled from shelves because it was delaminating. Several fuel line suppliers used the same hose and also had to pull theirs off the shelf. The tank you show is definitely an "old" style 3 gallon tank. Again, ethanol can cause the breakdown rather quickly of plastics used to manufacture these. I will say, based on a quick glance the tank should not have failed where it did and could have been defective or become broke in shipment. We currently build all of our 3 and 6 gallon tank in the US and have not had the issues you are showing. Without pictures of the 12 gallon tank that is also mentioned I cannot comment. I will say again that all of our tanks meet and exceed all current regulations. I would encourage you to reach back to me and I would love to speak to each of you offline to discuss.

    1. Thanks you for your response Mike, even if it took almost 4 years. As I said, I would be happy to discuss this with you if you give me your contact information. A couple of additional comments. As a marine service technician for over 35 years, I am well aware of the issues with ethanol. Our outboard is a 1998 Johnson and it has NEVER seen ethanol fuel, nor will it ever. The outboard pad that failed has nothing to do with fuel. As stated, your "new" style tanks are experiencing the same problems, including the 5 gallon plastic standard gas jugs. That is from both personal experience and first hand comments from other boaters. Unfortunately by the time we have these face to face discussions with others, they have disposed of the tanks and we don't have photos. I would be happy to send you a photo of the current 14 month old tank that has split apart. Contact me as I stated above and we can certainly talk about it. We have no ax to grind with Moeller. Our purpose for the blog is to report our experiences with products we use and how we use them, along with many other things. The blog typically has 200 to 300 visitors a day and many reply via the message widget and not using the comments box so they don't show up here. Thank you for taking an interest. Chuck

    2. I'm going through the same BS. I purchased the Moeller 3 gallon last year and it has leaked from day one. I'm also NOT nor never will use gas with ethanol in it. I just purchased a so-called "manual" vent cap off of epay because the cap that came with the tank will not let air in unless I press down on the top, spring loaded button. Opening the vent by turning it does nothing in terms of letting air into the tank.

      Lesson learned, no more Moeller products, period!!!

  4. Ditto, I bought a tohatsu 6 hp 4 stroke moto this summer. It came with the 3 gallon tank. Moeller product. Won`t vent in at all. Bought a new manual vented cap off ebay. Solved that problem.Its a California mandate to have those EPA approved caps when sold. But they won`t vent. So the only way to solve the venting issue is to throw that piece of scrap away and replace it. Reflects Moellers reputation as a marine supplier. However it is required cap when sold. Too bad.


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