I believe most if not all Yanmar (or any diesel) are interference engines.
I think they recommend 1200hrs or 4 years on timing belts. Best to ask the
dealer.

On Fri, Jul 31, 2020 at 11:07 AM Robert Abbott via CnC-List <
cnc-list@cnc-list.com> wrote:

> Jeffery,
>
> Thank you for the explanation.      I have a Yanmar 2GMF which I will
> assume then is a non-interference engine.
>
> Any idea when the timing belt should be changed.....e.g. number of engine
> hours or overall age of the belt?
>
> Rob Abbott
> AZURA
> C&C 32 - #277
> Halifax, N.S.
>
>
>
> On 7/31/2020 11:57 AM, Jeffrey Brideau via CnC-List wrote:
>
> Some engines are deemed interference engines wherein the pistons occupy
> the same space as an open valve. If the timing belt brakes, the pistons
> become out of sync with the valve train and havoc ensues. With
> non-interference engines, it’s just a major inconvenience.
>
> On Fri, Jul 31, 2020 at 10:34 AM Robert Abbott via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Has anyone ever experienced an issue with a broken timing belt in our
>> marine diesel engines?
>>
>> A club member had his break recently and it destroyed his engine which
>> he choose to replace rather than repair....and not sure if it actually
>> could be replaced.   I'll get more info on the exact type of engine and
>> the extent of the damage.  He said some marine diesel engine 'timing
>> belts' can break but not cause the kind of damage his did.
>>
>> Rob Abbott
>> AZURA
>> C&C 32 - #277
>> Halifax, N.S.
>>
>>
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