The back unit is lowering

[Boomer 123]

I have a Rivera inboard and when I put the back unit up, the next day it will lower itself. I'm new to boating and not sure if can check this myself. I see two hydraulic cylinder on both sides of the prop, and a hydraulic pump inside the boat. I dont see any fluid anywhere. The pump on the inside of the boat engine compartment has a red cap that I cant get off . Is this a fluid problem? Something that I could check or something bigger. Thanks for any help to lower the cost of boating, Boomer123

 

[Don S]

Re: The back unit is lowering

Welcome to iboats boomer. Going to need some more info, read this.
http://forums.iboats.com/showthread.php?t=220416

 

[Boomer 123]

Re: The back unit is lowering

It is a 1994 G.W. Invader, Model, Rivera with a Volvo Penta 5.0 fl motor. The lower prop said Volvo Penta SX Series. The pump on the inside of the engine compartment has no listings, only a red cap with a yellow warning sign. I dont want to brake the cap because I'm not sure what it is. Thanks for help with the site and any other help with lower unit problem. Thanks Boomer 123

 

[Don S]

Re: The back unit is lowering

Leakdown of the outdrive is normally caused by a defective trim pump (the hydraulic pump inside the boat).

I would suggest you go to the link below and download the owners manual for your particular engine, you will need the FULL model number or the serial number to get the right one.
http://www.volvopenta.com/volvopent...lication_search/pages/publication_search.aspx