I am seriously thinking about buying a used Yanmar 3HM35F to replace my Volvo MD2B engine. I was originally going for a Yanmar 3GM30F however the 3HM35F became available. Do these two Yanmar engines have the same physical dimensions. The engine bay I have in my Rival 32 will just fit a 3GM30. As well, does anyone have a brochure or other information that they can provide which will assist me in deciding whether or not to buy the 3HM35F.