Technical help-gctid822874

[tubotes]

I Just want to say a big thank you to those folks who have left advise in archives. I have removed the engine from my '86 1950 bow rider, volovo penta 305. I t had a large oil leak thru the pan gasket gasket when I bought it, so I removed the engine to repair it. While the engine is being checked out , iI have been reading the previously posted material about out-drive issues. I have now gotten the intermediate drive shagft bearings cleaened and greased, serviced the u-joints, and adjusted the transmission shift, lock linkage. Could not have gotten this far without all the advice from you folks. Next job is to improve the engine box ventilation. I am thinking of using a heater/ac fan to push fresh air into the engine space, and let it vent out thru the existing ports on the aft upper rear panels. Any advice yes/no good idea/bad idea will be appreciated. anyway, thanks to all! Will try to post fotos in future, but old guy, computer challenged, will ,see if it works.

[Amadaies]

Do not use anything NOT marine rated for a blower!!!

Use something like this

http://www.hodgesmarine.com/Jabsco-3-Flexmount-Blower-105-Cfm-12v-p/jab35515-0010.htm?click=39123

Run it for at least 3 minutes before turning on the key to evacuate any fumes that have collected or you run the risk of blowing up!

[Pcpete]

No! No! No! Do not use anything except marine certified equipment! There's nothing wrong with doubling them up and you could do a push/pull setup but if you buy a large cfm blower it will do the job very well.

[GearGuts]

Generally speaking you don't want too push air into your engine space. The engine room and fuel tank area are the source of explosive fumes when hose failures and other bad things occur to the fuel system and you don't want to push those heavier than air fumes into the bilge spaces in your boat. You want too suck them out, so an exhaust blower rated for marine use drawing air out is the only way to go.

[builderdude]

"GearGuts" post=822880 wrote:
Generally speaking you don't want too push air into your engine space. The engine room and fuel tank area are the source of explosive fumes when hose failures and other bad things occur to the fuel system and you don't want to push those heavier than air fumes into the bilge spaces in your boat. You want too suck them out, so an exhaust blower rated for marine use drawing air out is the only way to go.

+1 and one like Amadaies linked to is superior to the standard turbo type blowers.

[2850Bounty]

"GearGuts" post=822880 wrote:
Generally speaking you don't want too push air into your engine space. The engine room and fuel tank area are the source of explosive fumes when hose failures and other bad things occur to the fuel system and you don't want to push those heavier than air fumes into the bilge spaces in your boat. You want too suck them out, so an exhaust blower rated for marine use drawing air out is the only way to go.

My thoughts exactly.

You want to pull air out from within the engine bay.

Also...... Squirrel cage blower motors will outlast the in-line or turbo style 10 to 1 or better!

.