Yamaha got sued for infringement before they could get their service network up and running back in 1994.
Capt Ken is the only one I know of that used to work on them
https://m.facebook.com/profile.php?id=100063834931263
If you are sitting on a trailer, the highest manifold is the hottest
Also, if you haven't replaced the impeller, do so
If you find pieces missing, find them
Had a bunch of hot rod parts from an evilbay seller show up for a different motor that looked like they were removed with a hammer
Took a while thru evilbay
its hydraulic hose, the pump generates 2900 PSI
take your whole hose to a hydraulic shop that makes lines. they can make you new stainless steel braided teflon lines. however it may cost less to get the correct hose thru one or two of the OMC specialty shops such as T&E (sterndrive.info)
