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Old 25 December 2013, 16:37   #1
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Yamaha timing belt change, should I change it due to age rather than hours?

Hi everyone

I have a Yamaha F115 on my 2007 Ribeye. I bought the boat in May 2013 with 52 hours on the engine and serviced it before putting in the water with all the usual oils, plugs, filters and impeller etc. but didn't change the timing belt. I've clocked the hours up so far this year from the 52 to a total of 97 so was planning to do a 100 hour service now. My question is, I'm nowhere near the 1000 hours for a timing belt change but it is past the five years change recommendation so should I do the belt or leave we'll alone as the hours are low? How reliable are the Yamaha belts?

My gut says change the belt and don't even think about it but you know how it is when something's going well, you don't want to tinker and cause a problem :-)
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Old 25 December 2013, 16:41   #2
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100% change the belt they deteriorate with age more than use
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Old 25 December 2013, 16:56   #3
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Old 25 December 2013, 22:41   #4
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I would recommend inspecting it, but for vehicles the interval is 7 years, and even then we rarely see them break or deteriorate in that time frame.

No need to over service an engine either...although it typically won't hurt anything.
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Old 26 December 2013, 02:20   #5
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Peter

Is that for ALL American belts in ALL American Vehicles? My UK VW Diesel engine has an 80,000 mile & 48month interval.

"Rarely see them break" trouble is when they do at the very least its an expensive re-set up of all the engine timing or if your cylinder is too short its very very messy and you are gonna damage pistons and valves. On a car thats bad but 99% of the time will result in a lot of expense and parking up on the hard shoulder for a while.

On a RIB if it happens while out that at the very least means a tow back in, and if it happens at the wrong time while out the hard shoulder may well be the LAST place you'd want to end up!!
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Old 26 December 2013, 05:54   #6
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Morning, are you sure the service interval is 5 years? As when I was looking at the Yammie 150 - 250Hp 4 stroke engines the manual stated 1000 hours or 10 years whichever one came first.

I also priced up the timing belt which was 170 + Vat and the tensioner (hope you are sitting down) was a shocking .......................... 562 + Vat from Yamaha UK

If you do decide to go ahead with the timing belt change get the bits from USA / Canada as its sooooo much cheaper and I think there is a contact on this forum somewhere. If you can't find the link let me know and I will dig it out
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Old 26 December 2013, 06:53   #7
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http://www.yamaha-motor.com/outboard...nce_Charts.pdf
Reads to me like 1000hrs only, Rest is inspection.
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Old 26 December 2013, 07:02   #8
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The timing belt of my F100 has to be inspected every 200h / each year and should be replaced after 5 years / 1000 hours .
I would not risk anything and would change it . Even if it does not cut it can jump over and can cause either damage or breakdown .

From my workshop manual :
(*1)
Be sure to replace the timing belt after every 1,000 hours (5 years) of operation.
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Old 26 December 2013, 07:27   #9
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My owners manual says maintenance intervals are based on 200 hours use per year( I wish! :-) ) with timing belt change interval being 1000 hrs or 5 years, whichever comes first. As I didn't buy the rig new, I'm erring towards changing it and doing the service at the same time so I can get on a known pattern moving forward.
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Old 26 December 2013, 07:55   #10
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