1989 340SD: What size are my bilge blowers?

carboncow

carboncow

Member
Jul 25, 2014
55
Ohio
Boat Info
1989 340 Sundancer & 2007 Sea Doo Challenge 180
Engines
Mercruiser TbIV 454ci V-drive % Rotax 4stroke 215HP
My port blower bearing was screaming this weekend...worried it may seize, trip breaker and then have no blowers. Kid, wife and life me from investigating this afternoon figured you guys would know what size (diameter) of the blower/tube is. 3" or 4" on these models?

Thanks!
 
It's a 4" on my 1989 340 Sundancer. Cant imagine yours being different.
 
northshore said:
It's a 4" on my 1989 340 Sundancer. Cant imagine yours being different.
Click to expand...
northshore said:
It's a 4" on my 1989 340 Sundancer. Cant imagine yours being different.
Click to expand...

Agreed. The more I read last night based on the size of the bilge it sounds like it needs a higher CFM rating which seems to come with the 4" solutions. Thanks again.

Any chance you replaced yours and have a recommendation. Doesn't seem to be much out there about who is any quieter then another and I"m sure anything new would be quieter then the OEM from 25 years ago.
 
You can upgrade to the squirrel cage type but the cost is quite a bit higher. They are quieter though. I always figure blowers are throw-aways and I would be replacing them anyway. In fact I always have one in the garage in my spare pasts tub.
 
NorCal Boater said:
You can upgrade to the squirrel cage type but the cost is quite a bit higher. They are quieter though. I always figure blowers are throw-aways and I would be replacing them anyway. In fact I always have one in the garage in my spare pasts tub.
Click to expand...

I had a extra in my garage too and cannot find it. It may be a 3" and I would use that to replace my kitchen/bathroom vent that seized. Now I may go squirrel cage on that to keep it quiet.

These appear to be the highest rated on Amazon, any thoughts on these rule units?

https://www.amazon.com/dp/B000O8D0IC/_encoding=UTF8?coliid=I1TYKJ66MR1205&colid=3PDO60E60ZZ0F
 
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