CMB 80RS-H sleeve breakage??

I myself only want to give my customer accurate information to which you have now supplied, it is clear there is no warranty on this breakage even though you say that Art & yourself have spoken to CMB about it. At this point if there is no guarantee that the honing process solves the issue I will advise him to strongly consider an HR or RS91 instead. I personally feel that it is not fair to you, your dealer network or the end users of these motors that there is a known problem & the manufacturer will not stand behind it. It is a rather nice gesture on your part that you have kept the price surpressed on this motor to possibly help offset the cost of replacement parts but you shouldn't be in that position in the first place. For what people are now paying for these engines a little better factory support to you & your customers should be expected. If you consider that bashing then so be it, I see it as just another reason we keep seeing nitro guys switching to gas..... h34r:

BTW- my reference to Tidewater's support on warrantying broken stuff was based on how they had been for a good number of years previous to this situation. I know of many instances where Sandy sent racers replacement parts at no charge when a legitimate failure occurred.

Very well said Don.The service from Tidewater was awesom.Nothing good ever lasts.Wonder why?

Roxyflash said:

Very well said Don.The service from Tidewater was awesom.Nothing good ever lasts.Wonder why?

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Hello Stu, i dont believe Don is bashing CMB. Just wanting info for his customer, the way i read it. Telling boaters to buy OPS, if they dont like CMB, is not a very good way to represent a line of engines. Kinda like a bad attitude kinda thing, in my opinion. I believe for the cost of these motors, a customer should get a well engineered and reliable engine, without a additional cost fix. One more thing, how about a informative web site here in the USA for the CMB line of engines? Richard D

Guys before this takes a turn in the wrong direction keep in mind I only started this thread in the quest for an answer to the sleeve breakage and if anyone, including CMB, had a viable working solution. I think that it's most unfortunate that the manufacturer has yet to offer up an answer even after they've been approached by the previous & now current US distributor, it's not like this surfaced yesterday. Like I said before I don't think it's remotely fair to Stu, who has stepped up mightily to fill the void left by Art & Co. retiring from the hobby after many years of support, to not receive what I would term as adequate support here. It's a shame that there seems to be no real way for racers to share their thoughts & issues directly to CMB as Stu is but one voice & I'm sure he is doing his very best to get them to come up with a long term solution & I hope they do. Since this is an "international" site, would it not be wise to see if input can't somehow be directed from across the boating community to CMB so guys like Stu don't have to go at this as individual voices? We may be a small faction of the r/c community but I would think sticking together brings strength in numbers. Am I wrong in thinking this way? :blink:

Don Ferrette said:

Guys before this takes a turn in the wrong direction keep in mind I only started this thread in the quest for an answer to the sleeve breakage and if anyone, including CMB, had a viable working solution. I think that it's most unfortunate that the manufacturer has yet to offer up an answer even after they've been approached by the previous & now current US distributor, it's not like this surfaced yesterday. Like I said before I don't think it's remotely fair to Stu, who has stepped up mightily to fill the void left by Art & Co. retiring from the hobby after many years of support, to not receive what I would term as adequate support here. It's a shame that there seems to be no real way for racers to share their thoughts & issues directly to CMB as Stu is but one voice & I'm sure he is doing his very best to get them to come up with a long term solution & I hope they do. Since this is an "international" site, would it not be wise to see if input can't be directed from across the boating community to CMB so guys like Stu don't have to go at this as individual voices? We may be a small faction of the r/c community but I would think sticking together brings strength in numbers. Am I wrong in thinking this way? :blink:

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At least there are alternatives. The CMB line of engines for the most part most are good engines. The 67 hr is bullet proof.If you stop and think back 10 years the r/c marine engine has made leaps and bounds.warranty has always been something out of the question. A good boater will flush and pamper a engine but others seem to forget abour proper usage.That in itself kills warranty Mike

Richard,

Perhaps you are right if you take the context of my reply to this thread only. My frustration has been with some other comments on a different thread. My interests have been to basically wholesale the product. I have encouraged some of my dealers to develope websights. My intent is not to compete with my dealers. I am not opposed to doing a warranty on products but, if a fix can be found and that info is given and a customer chooses not to follow, then I have done the best that I can. I have been in this hobby for 30+ years and I have seen all the impefections of all the manufacturers. Even though they are not perfect, they are the best that I have ever seen as far being able to take from the box with little mods, run very well. My own personal motors have very little done to them and I feel that they outperform any other motor that I have used. My line to CMB will now be much more direct and corrections have and will be communicated. My appology to those who have taken my comments in this thread only.

Stu Barr

Stuart Barr said:

Richard,Perhaps you are right if you take the context of my reply to this thread only. My frustration has been with some other comments on a different thread. My interests have been to basically wholesale the product. I have encouraged some of my dealers to develope websights. My intent is not to compete with my dealers. I am not opposed to doing a warranty on products but, if a fix can be found and that info is given and a customer chooses not to follow, then I have done the best that I can. I have been in this hobby for 30+ years and I have seen all the impefections of all the manufacturers. Even though they are not perfect, they are the best that I have ever seen as far being able to take from the box with little mods, run very well. My own personal motors have very little done to them and I feel that they outperform any other motor that I have used. My line to CMB will now be much more direct and corrections have and will be communicated. My appology to those who have taken my comments in this thread only.

Stu Barr

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Stu, thank you for the reply. I have been running CMB since the 1980s. Always liked the steel rod needle bearing concept. Good luck to you with your CMB distributorship. Richard D

Now that things with this situation have calmed down, and I think we are all on the same page now, think for a minute about these people who dig deep into their pockets to find the money to make parts, distribute engines, radios, make boats and other accessories that we all need to have to put our boats together to enjoy our hobby. Without people like Stu Barr, Andy Brown, Remy Haynes, Bill McGraw, Art McMeans, Tom Perzentka and Jim Irwin ( just to name a few, because there are MANY MORE ) this hobby would not be what it is today. The airplane and the car guys couldn't care less about any of us that run boats. I started making turn fins more than 20 years ago because I thought I could make something that looked a little better and would make the boats run better than what people were getting with their boats. I am not getting rich by doing this, but it helps pay for SOME of my hobby expenses. The real payoff for me is when someone calls or sends an email and tells me how much better their boat runs with a fin that I sent to them. THIS is the real reason that I do this. And you can probably ask ALL of the people that I listed above and they will tell you pretty much the same thing. All of these people went out on a limb and dug real deep into their own pockets that most of us wouldn't even think twice about doing. They all did it because they love this hobby that much more than we do. They are doing the best that they know how to do. They make mistakes just like we do, but when it is all said and done, things usually get worked out where both sides can smile and walk away.

We need to thank these guys for doing what they are doing for our hobby. A question or a little criticizisum ( ? ) now and then can be a good thing, but it doesn't always have to be put on a public forum to get the answer you're looking for or resolution to a certain problem. Think about it...............

This has taken me a LONG time to type this because I can only use one finger on my left hand..............be thankfull that I could not use both hands this time!

REHAB SUCKS!

Dick Tyndall

I know this is a very old thread. I have a CMB .67 in an outrigger. I was sent 2 brand new .80 piston/sleeve sets that will fit in this engine. I see no finger over the exhaust port. Is this a new design that has corrected the problem? As far as the honing goes I can see where a small loose fitting ball hone ran in the reverse direction the the forward direction would smooth the edges of the ports. Sharp edges in a V-8 racing engine are places where engine parts fail 1st. I have built hundreds of auto racing engines and the crankshafts journals are radius'd and rod big and little end are filleted. No sharp edges anywhere even on the wrist pins. Sharp edges are weak and prone to fail every time. Back to the question I am new to the CMB and NR engines that I have. I will not put the .80 liners in if they are the ones that crack. Is there a photo of the ones that crack that someone can provide so I can compare ? As I said I have no fingers the exhaust port. I will try to upload a few pics of the one I have.
Thank You All.
Chris

Chris Haley said:

I know this is a very old thread. I have a CMB .67 in an outrigger. I was sent 2 brand new .80 piston/sleeve sets that will fit in this engine. I see no finger over the exhaust port. Is this a new design that has corrected the problem? As far as the honing goes I can see where a small loose fitting ball hone ran in the reverse direction the the forward direction would smooth the edges of the ports. Sharp edges in a V-8 racing engine are places where engine parts fail 1st. I have built hundreds of auto racing engines and the crankshafts journals are radius'd and rod big and little end are filleted. No sharp edges anywhere even on the wrist pins. Sharp edges are weak and prone to fail every time. Back to the question I am new to the CMB and NR engines that I have. I will not put the .80 liners in if they are the ones that crack. Is there a photo of the ones that crack that someone can provide so I can compare ? As I said I have no fingers the exhaust port. I will try to upload a few pics of the one I have.
Thank You All.
Chris
View attachment 275642 View attachment 275643 View attachment 275644

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Chris,
The P/L that you posted photos of are not the ones that some people were having trouble with.

Buckshot said:

Chris,
The P/L that you posted photos of are not the ones that some people were having trouble with.

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Thank You William, Are these a newer and corrected design or a different series of CMB's?