Does anyone know if Yamaha designed / manufactured their own head for use on the GM 3.0 block?
I think I have a leak from the exhaust gasket, and hoping I can use a gasket from a Mercruiser or similar.
Advice...?
Thanks in advance,
I'm not an expert, really just a Back-yard Mechanic / Gear Head.
I don't believe Oil Seals will effect water leaking - not positive though
My pump works perfectly with the Jabsco impeller. It came with 2 O-rings and a gasket. I only used the Impeller and the Thin O-ring.
(I didn't open the...
My pump is working perfectly with this Impeller;
It does sound as though you may have an Air leak if the pump functions as you mention when not connected to the Raw Water Hose leading from the drive.
Thanks Scott,
I have a new shutter, couplers etc. As you said "Burnt up all the rubber bits..."
Do I need to be concerned about where the rubber debris has ended up?
Hello all, I'm not only new to the forum but also a new -1st time boat owner.
Issue;
Overheated the Yamaha L4 3.0, (water pump drive belt failed)
Belt replaced along with a 140* Thermostat.
Prior to the Overheat, it always ran at 140*, now runs at 150*+, not the same power, and a very...
I have ordered the Jabsco 1210-0001, ($55.00 CDN on Amazon) from my research this is the correct crossover from the OEM part; YSC-70R-12457-00-00
My current installed is a 12-blade - still working great, just old and had sat for a couple of years.
Check this website...
