I understand that this one of the greatest challenges in all of boating-sort of a climb to Everest's summit with all of the risks and few of the rewards. That said I am still going to try to do the job. I have changed impellers on Crusader 502s and I am aware there is no comparison. That said, do I need any unusual tools like Jabsco's puller? I suppose first I must figure out which pumps I have model and serial #. Plastic or metal etc. Maybe a board placed across the open hatchway would help. I could lie on it and reach down while doing some of the work-I have very long arms. What goes with that is a 6'4" frame that makes bilge work very difficult. If I figure out what pumps I have and their serial and model #s does Les have the kits. Any encouraging and helpful info would be greatly appreciated!
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1997 330DA Impeller Change
- Thread starter Bliss
- Start date
Do you have the combined seawater pump / fuel pump assembly ? If so you want to disconnect the fuel and seawater lines, remove the pump assembly with bracket and take the whole thing to a bench for further work. Before you start be sure you have all the parts for your model - there were two -- a one-piece design and a two-piece design. They have different gaskets or o-rings and wear plate configurations. I believe the impeller is the same part.
Next, drain the fuel pump oil reservoir and check the lube for any signs of water. If there is any water in the oil, buy a new pump (not cheap at ~$370 each, I bought two last year).
If that's okay it's disassemble the water pump end, push or remove the impeller from the pump body, and then put in a new impeller and replace all seals/gaskets with new. My mechanic strongly suggests also replacing the wear plate(s) with new parts as well. Don't forget to refill the fuel pump oil reservoir - spec is Quicksilver High Performance Gear Lube. Then reinstall the pump assembly and connect all the lines.
You can find the exploded parts diagrams for both versions in the Mecrusier Application guides at Boatfix.
edit - I should have added - it's a good time to replace the v-belt(s) as well.
Next, drain the fuel pump oil reservoir and check the lube for any signs of water. If there is any water in the oil, buy a new pump (not cheap at ~$370 each, I bought two last year).
If that's okay it's disassemble the water pump end, push or remove the impeller from the pump body, and then put in a new impeller and replace all seals/gaskets with new. My mechanic strongly suggests also replacing the wear plate(s) with new parts as well. Don't forget to refill the fuel pump oil reservoir - spec is Quicksilver High Performance Gear Lube. Then reinstall the pump assembly and connect all the lines.
You can find the exploded parts diagrams for both versions in the Mecrusier Application guides at Boatfix.
edit - I should have added - it's a good time to replace the v-belt(s) as well.
Sounds same as mine - I have '97 330 DA with carbed 7.4l, serial numbers OK261293 and ...294. Here are the parts breakdowns.
First, the two-part assembly - you will want parts 4,7,8,9 and 10 in the exploded view. It takes two of the 8 gaskets for each pump.
http://www.boatfix.com/mercag/parts1.asp?partno=2357&block=160&img=CRUISER/822049.965/15.pdf
The one-piece design - you'll want parts 3,6 and 7
http://www.boatfix.com/mercag/parts1.asp?partno=2357&block=170&img=CRUISER/822049.965/16.pdf
Don't forget the gear lube for the fuel pump reservoir, and belts if you decide to do so.
First, the two-part assembly - you will want parts 4,7,8,9 and 10 in the exploded view. It takes two of the 8 gaskets for each pump.
http://www.boatfix.com/mercag/parts1.asp?partno=2357&block=160&img=CRUISER/822049.965/15.pdf
The one-piece design - you'll want parts 3,6 and 7
http://www.boatfix.com/mercag/parts1.asp?partno=2357&block=170&img=CRUISER/822049.965/16.pdf
Don't forget the gear lube for the fuel pump reservoir, and belts if you decide to do so.