Yanmar 1GM10 alternator belt size

[Gosportsailor]

Good Afternoon
Can anyone advise how I can tell which size drive belt is right for my engine - there seem to be two choices? Engine fitted in 2008.
Thanks

 

[Boater Sam]

Any numbers remaining on the back of your belt?

 

[Sandy]

Do you have a tape measure?

 

[srm]

Take the belt to an auto parts store and ask them for a replacement. If you get a spotty faced youngster who needs a part number for a computer head elsewhere. Agriculture engineers are usually pretty good at recognising parts if you pass through a rural area. If the belt fits make a note of the size and buy another as spare. Method has worked for me with a couple of engines (including a 2GM but that was boat before last so can not remember size).

You might find the engine manuals online.

 

[Paul HD]

Good Afternoon
Can anyone advise how I can tell which size drive belt is right for my engine - there seem to be two choices? Engine fitted in 2008.
Thanks

Looks like measuring is your best bet. 737mm or 788 mm

Yanmar 1GM10 Alternator Belt

 

[dukeofted]

My 1GM10 used a Gates 6560MC but there are two different lengths so you need to double check which is correct for your engine.

 

[andsarkit]

The earlier engines had a smaller alternator pulley which rotated the alternator faster but put a significant load on the engine when just started.
You probably need the longer belt and here are some options~;
Mitsubishi REMF 1305

Nissan 11720-83075-1

Yanmar 105582-77790

Simply Bearings AVX 11.5 x790 or AVX 11.2 x 785

Totally belts AVX 11 x 790 or AVX 11.5 x 790

Euro car parts, Dayco AVX11.5 x 790 for Passat 1.9D 1995 with power steering +AC £7.82 Part code 202774225