V belts
- Thread starter sailfree20770
- Start date
Why not just get one of these and fit it to your engine? Problem solved? Maybe get two in case the first one wears out.
http://www.johnstonesupply.com/storefront/product-view.ep?pID=P51-900
http://www.johnstonesupply.com/storefront/product-view.ep?pID=P51-900
those are good belts ...haven't used them on engines yet ...but i do use them on woodworking machines in my shop ....word of caution don't use on aluminum sheaves it will ware them out
I ordered a replacement belt based on part number in the Yanmar manual - when I got it found out that the belt does NOT consider going aroud the alternator. Went to local auto parts place, they measured, pulled one off the shelf and I was in business in less than 30 minutes (including going to the auto parts place).
Also note that pulleys come in two "V angle" types. they are not interchangeable. I've seen the engine and alternator have different angles which is a non-stater IMHO
I am retired now, but spent 45 years working in the Diesel Engine Industry, as a Mechanic and District Service/Parts Manager. I've represented both USA and Japanese Diesel manufactures and can say without doubt that the quality of the Japanese products are incredible!! If you are lucky enough to have a Yanmar engine in your boat, why would you ever think of using any other manufacture's part. It is hard to understand why a person would try to save a few dollars by trying to redesign a product as good as the Yanmar. Another example are oil/air/fuel filter and fasteners. Please alway use OEM Parts, they are tested and are covered by the manufacture's "Parts Warranty!" Of course they can be a little more expensive, but the manufacture has a right to make a profit and use that profit to support their Parts/Service Networks! Here is a saying that I have used for years. " To many people measure thing using a Micrometer, then mark it with a Piece of Chalk, and then Cut it with an Ax." How you expect good results using this kind of thinking is beyond me, but you see it every day!
v-belt seelction
As someone who has fought belt dust for years I would suggest you select the belt based on the alternator pulley not the engine pulleys -
-the main drive pulley is large there will be no slippage there
-there is no significant load on the water pump pulley
-the main load is on the small alternator pulley - this is the one that will slip and cause dusting
so if you have a metric pulley on the alternator use a metric belt otherwise use a standard american size.
As someone who has fought belt dust for years I would suggest you select the belt based on the alternator pulley not the engine pulleys -
-the main drive pulley is large there will be no slippage there
-there is no significant load on the water pump pulley
-the main load is on the small alternator pulley - this is the one that will slip and cause dusting
so if you have a metric pulley on the alternator use a metric belt otherwise use a standard american size.
+1, but I went with the AltMount prior to the Balmar acquisition after putting a much larger alternator on our boat. Zero dust and much better reliability.
http://balmar.net/2013 Web-Design/altmount.html
Yanmar Belts
Here is a picture of the reason I would not use a Yamar belt. This belt only had few hours on it when I noticed it was about to fail. No nicks or burrs on the pulley. Replaced it with a Gates belt of much higher quality.
