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How long can I go without service

Old 05-11-2011, 08:52 PM
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Default How long can I go without service

I purchased a new 250 yamaha four stroke in august last year and now have 360 hours. I have been getting it service every 100 hours but my service center cant get me in for another week. Right now Im at 132 hours since my last service. How much more can I go before I should be worried. I wanted to use the boat a few times over the weekend?
Thanks
Jake
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Old 05-11-2011, 09:44 PM
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I would check the oil level and run it. However someone will post that Yamaha might deny a warranty claim if something happens. I doubt that's true unless they can (and want to) prove that the issue was directly related to the lack of service.
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Old 05-12-2011, 04:24 AM
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How hard is it to do a 100hr Service. Can you at least just change the oil and filter?
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Old 05-12-2011, 04:36 AM
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Originally Posted by SHAMROCK69 View Post
How hard is it to do a 100hr Service. Can you at least just change the oil and filter?
There is more to the 100 hour services than just oil, filter, and gear oil, but those are the most important. You are already 30% over on the engine and gear oil. As the hours add up, different items have to be inspected, adjusted, or replaced.

The Yamaha owners manual specifies 6 month oil changes if you do not put a whole 100 hours on within that time.
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Old 05-12-2011, 05:39 AM
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run those motors until 150 or 200 hours in between servicing no problem anyone who says different is an idiot.... how often do you change your car oil at 3,000 miles???

its a guideline made at that interval to make Yamaha lots of money on oil, impellers etc....run the motor, oil does not break down in 50 or 100 hours....
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Old 05-12-2011, 05:40 AM
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Originally Posted by seahorse View Post
There is more to the 100 hour services than just oil, filter, and gear oil, but those are the most important. You are already 30% over on the engine and gear oil. As the hours add up, different items have to be inspected, adjusted, or replaced.

The Yamaha owners manual specifies 6 month oil changes if you do not put a whole 100 hours on within that time.


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Old 05-12-2011, 07:57 AM
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Like cowdogs said...check the oil & run it! Won't hurt a thing as long as 1.The oil level is within normal operating range , and 2. The oil is not too overly diluted with fuel, as in "making oil". If #2 were to be the case, you would have an oil level reading that was well above the "FULL" line on the stick, and you could smell & feel the diluted oil...that's what God gave you a nose & fingers for, y'know!
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Old 05-12-2011, 08:07 AM
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That motor is toast, I'll be by tonite to pick it up and dispose of it for you.
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Old 05-12-2011, 08:09 AM
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Quite vaired opinions. There are far too many components to go unchecked beyond 100 hours from my experience. I think people are confusing service every 100 hours and inspection. You can go longer for service than recommended for almost everything on the motor (excluding oil). I wouldn't suggest going too long without have crticial components inspected. There are redundant seals in the lower unit that usually crack/split. If they both fail....that's a problem that will go unchecked until too late. Lower Unit with seawater......never know it until it's too late. Seastar gaskets don't last forever and usually checked by mechanic during inspection/service. I think this will be a good thread and looking for feedback as well! Good luck with the F250!

PS: Since you are racking up a lot of hours.....I'm guestimating oil only every 100 and INSPECTION/ service every 12 months.
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Old 05-12-2011, 08:45 AM
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100 hours of use on an outboard due to the high rpms is equal to 7-8000 miles of driving in a car,you do not drive your car that long without at least changing the oil.
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Old 05-12-2011, 09:00 AM
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Originally Posted by katman2860 View Post
100 hours of use on an outboard due to the high rpms is equal to 7-8000 miles of driving in a car,you do not drive your car that long without at least changing the oil.

means nothing. why?

- because if you put new oil in a car, you CAN run it for 20-30,000 miles before the oil begins to break down to the point where it will harm a motor.....

oh and about cars.... they have oil that is tested up to 15,000 for every change.... 15,000...

the yama lube oil is superior to almost anything else on the market, it will last you 1,000 hours on a boat if needed before it begins to break down...you might loose some oil, or make some, but as long as there is a consistent oil level and no delusion, your fine... not recommended nor what i do, but it would not hurt the motor.
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Old 05-12-2011, 09:07 AM
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So nobody has made a comment about the impeller? I thought that was a major component changed out at the 100 hr check? From what I read the impeller replacement is about the only thing on a 100 hr check it is difficult to do yourself. Am I wrong or should it last 200-300-400 hours too?
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Old 05-12-2011, 09:08 AM
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Originally Posted by nexxxt214 View Post
means nothing. why?

- because if you put new oil in a car, you CAN run it for 20-30,000 miles before the oil begins to break down to the point where it will harm a motor.....oh and about cars.... they have oil that is tested up to 15,000 for every change.... 15,000...

the yama lube oil is superior to almost anything else on the market, it will last you 1,000 hours on a boat if needed before it begins to break down...you might loose some oil, or make some, but as long as there is a consistent oil level and no delusion, your fine... not recommended nor what i do, but it would not hurt the motor.
i dont care who you are...that is just plain funny...i'd share that with the customers ive had with sludged up engines but they might believe it and try to sue me....

the load on a boat engine is incredible compared to that of an automobile...lets do some simple math to help the slower among us...we put 200 hp on a 1500 pound boat and it tops out on a good day at 50 mph...we put 200 hp in a 2300 pound car and it hits the governor at 118 mph before it runs out of steam....what can we conclude from this information that might lead us to believe that the oil might be under a little bit of a strain trying to keep things cool and well lubricated in one of our engines?...
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Old 05-12-2011, 09:12 AM
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Originally Posted by TrickyRick View Post
So nobody has made a comment about the impeller? I thought that was a major component changed out at the 100 hr check? From what I read the impeller replacement is about the only thing on a 100 hr check it is difficult to do yourself. Am I wrong or should it last 200-300-400 hours too?
its all precautionary... Ive never seen an impeller fail at 100 or 200 or 300 hours unless there was sand/mud/debris sucked up at some point... i know commercial guys that pull their boats every month or 200 hours and have thousands of hours like this...

changing the impeller is easy, all you do is drop the lower unit and take off the water pump housing....

just look at the commercial guys who put 4000 hours a year on their boats... you think they pull the boats out 40 times a year?
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Old 05-12-2011, 09:14 AM
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Just because oil doesn't break down for 15000 miles doesnt mean it's not contaminated with fuel, carbon, water, metal from normal engine wear. Once the filter is running in bypass then you keep wending that through the motor. I'd check the oil, and use it over the weekend then get it serviced.
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Old 05-12-2011, 09:14 AM
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impellors are a subjective thing...some people go their whole lives without changing one out and many of of do it as a precaution because weve been stuck needing one at a bad time...
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Old 05-12-2011, 09:18 AM
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I think manufacturers will always assume a worst case scenario when recommending service intervals. It would only be in their and the consumers best interests. Their manufacturing and final test procedures are boiler plate and assure a very high percentage of foolproof motors that leave the factory. The keyword is "foolproof". This is what drives their inspection and service intervals. So there is really no way to give you any advice that would be helpful to you and be correct in all cases.

There are some things I can think of that would make more frequent inspections and service a good idea.

Things like;

Is the boat moored or stored on a trailer in a dry area.

Is the boat used daily or weekly, monthy?

Is the boat trolled for long periods? How often? Fresh or saltwater? Both?

Are oil changes done frequently, upper and lower, filters too? And importantly, gaskets to prevent infiltration and loss of lubricants.

Is there water in your fuel, are swapping out the separators?

How often does the skeg come in contact with the bottom or the ramp? the prop(s)?

Has the pump sucked any or a lot of mud?

How long at full throttle with a less than an ideal load? ie; lugging the motor? How many holeshots overloaded?

Ever overheated? for how long?

On and on. These types of things listed would tend to make for more frequent inspections and service by a pro rather than just cursory inspections and oil changes.

Ideally under good conditions with no abuse, these modern motors are gas and go.
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Old 05-12-2011, 09:38 AM
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Originally Posted by nexxxt214 View Post
its a guideline made at that interval to make Yamaha lots of money on oil, impellers etc....run the motor, oil does not break down in 50 or 100 hours....
Why then would the two US piston airplane engine makers, who do not sell oil or filters, recommend an oil change interval that is more stringent than Yamahas?

jethro the idiot who knows not to equate car engines with boat motor engines with airplane engines
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Old 05-12-2011, 09:39 AM
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Originally Posted by seahorse View Post
There is more to the 100 hour services than just oil, filter, and gear oil, but those are the most important. You are already 30% over on the engine and gear oil. As the hours add up, different items have to be inspected, adjusted, or replaced.

The Yamaha owners manual specifies 6 month oil changes if you do not put a whole 100 hours on within that time.

I understand there is more but I am Curious on how hard is it? If this were mine I would buy a manual and try to do most of it myself but I understand the time is money issue.

Why not just do engine oil and filter then take it in? The problem with oil is that it last forever but additives wear and junk gets in it.
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Old 05-12-2011, 10:14 AM
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Originally Posted by jethro1 View Post
Why then would the two US piston airplane engine makers, who do not sell oil or filters, recommend an oil change interval that is more stringent than Yamahas?

jethro the idiot who knows not to equate car engines with boat motor engines with airplane engines
operating rpm.....
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