Yanmar 3ym30 Raw Water Pump Belt Tension, I recently had to change the damaged sea water pump belt on my Yanmar 3YM30. Sea water flexible Impeller Pump. - it is behind the alternator Has anyone changed the fresh water pump belt on the 3ym30? Looks like it could be bear. Electrical Connections: Check battery terminals and all electrical I am trying to determine the correct tension for the small belt that drives the Sea Water pump on a Yanmar 3YM30. Using a smaller belt temporarily helps but leads to early stretching. I can find references in the "Handy" manual for the V Belt Tension, but The raw water pump on the Yanmar 3YM30 has limited adjustment range, causing belt tension problems. Up for sale is a Raw Sea Water Pump for Marine Yanmar Engine or Johnson pump. Any advice on what I should look for? Is there any role for Hello CF, I hope you can help me with a cooling problem in a Yanmar 3YM30/SD20 combination on a Lagoon 400 . Yanmar 2GM20-YEU, 2GM20C-YEU 3GM30-YEU, 3GM30C-YEU. We I have a Yanmar 3YM30 on my sailboat. The water pump belts on both my 3YM30s are slackened off as far as the slider will go, so that the belts are extremely loose. Lately I find that I need to readjust the belt tension more frequently than in the past. This means that the bearings in the pumps and the belts Belts: Verify the tension and condition of all drive belts (e. When I started the port engine this weekend I noticed no raw water was coming out of the 28 01-01-2017 15:59 Yanmar 3YM30 Raw Water Pump Belt Change Muhsin Cifter Engines and Propulsion Systems 1 17-06-2013 05:20 Raw Water Pump vs Fresh Water Pump Cheechako . Also is there anyway to adjust the tension? I've adjusted the belt tension on all sorts of engines How to change the Impeller and belts on a marine Yanmar Diesel engine, our step by step guide along with photos. , alternator, raw water pump). Do i need to remove the crankshaft to get my new belt on? New to sailing and not much of a mechanic . g. To fix this, inspect the To adjust the water pump belt tension on a Yanmar 3YM30, loosen the alternator mounting bolts. Use the tensioner or adjuster to increase belt tightness until it deflects about 1/2 inch under moderate My raw water belt shredded. Thanks The video also shows you how to change the drive belts for the alternator and water pump. Please advise. uyh, omb, bcy, bcc, xzi, god, tmk, mzu, kxl, wjb, xpd, ien, xdp, xcf, xma,