Belts

Jun 22, 2011
43
Hunter 35 Legend Kingston
Does anyone have the info or a good link on what the exact sizes of all three (Alt, Water and main) belts are for the Yanmar3gm30f?
 
Oct 14, 2005
2,191
1983 Hunter H34 North East, MD
Jackson...

I have only two belts on my 3GM30F. The shop parts manual lists these:

Alternator: A 36 inch V-belt; Part #121150-42290

Raw water pump: M 19 inch V-belt; Part #104511-78780

A Gates belt or equivalent quality from an autoparts store would be much cheaper than those from the factory. I found it best to take the old belt to the store for a direct replacement size instead of guessing.
 
Jun 22, 2011
43
Hunter 35 Legend Kingston
I have only two belts on my 3GM30F. The shop parts manual lists these:

Alternator: A 36 inch V-belt; Part #121150-42290

Raw water pump: M 19 inch V-belt; Part #104511-78780

A Gates belt or equivalent quality from an autoparts store would be much cheaper than those from the factory. I found it best to take the old belt to the store for a direct replacement size instead of guessing.
Strange - here are the three I have....

ForumRunner_20140802_133424.jpg
 
Sep 4, 2007
776
Hunter 33.5 Elbow, Saskatchwen, Can.
I would say that you have an A/C compressor that's not standard for the original engine. I like Dan's idea about just removing the belts and taking them to a parts store that sells gates belts. just my 2 cents worth.
 
Oct 14, 2005
2,191
1983 Hunter H34 North East, MD
Here's...

the front view of the standard installation...

Looks like a GM AC compressor from the partial view...
 

Attachments

Jun 22, 2011
43
Hunter 35 Legend Kingston
the front view of the standard installation...

Looks like a GM AC compressor from the partial view...
Makes sense as I do have a frost box that runs off the engine - will measure and go to auto parts store - just want spares to be safe.