I just recently purchased a 91 32 foot fountain with twin 502 mags. I have lower water preasure reading on the starboard side and I changed the impeller with no increase of preasure on the guage.Does anyone know where I can find the sending unit and what to look for?

Thanks
Running A Fever

hey did you get that from columbia sc

Should be a mechanical gauge, no sender used. It will be hooked to the block at 1 of the lower block drains. You 'may' have a partially blocked hose for the guage since the connection point is prone to being the spot where rust and sand sediments settle plugging the hose.
Did you back flush the water inlet hoses thru the coolers while the impellor was apart?

Swap the hose under the dash and compare,
As US1 Fountain said the hose connection on the block most likley has trash in it. take the hose off under the dash and blow air through it.

No I got it in Lake George N.Y. From a guy named Rick,He has been on this forum for years and told me about it.

ok there was one in sc that had runnin a fever on it thanks

A customer of mine had the same problem on his 32. The problem was a cracked Flushing Valve. This is a plastic piece that also let water into the bilge. (even more water than normal 32's) VERY inexpensive fix. The part is a Flush Pro Marine Flushing Valve. I hope that is your problem. Let me know.

Frankie
Pier 57

I didn't flush the cooler,but I did take the line off the guage and it is blocked at the engine. I just need to get under and remove the hose on the block, I think. I'll let you know how it goes.

Hey Nordic 95. Its me! Rick .Two things,when you
change the impeller I always buy the kit with a new
housing. If that housing is scored at all,it will really
affect the pressure. Also when installing,always pack
the impeller with vasoline.The hose is attached to the
left side of the engine below the exhaust manifold
in the center port. It will definetly be partially plugged.
Take it off ( a pain to get at) and stick a drill bit in
the fitting to clean it out.
How do you like her. Hope its runnin great and your
enjoying it!! P.S how do you like the picture of your
boat in my avitar. Looks great doesnt it!!

Hey Rick

I did replace the housing and all. It still reads 0 psi at idle and 7psi at 3500. I figured is was clogged because at idle the engines now run the same temp.I really love this boat,It is such an eye catcher,even on the way home that day people were giving thumbs up on the thruway.I knew I would hear from you on here someday,as soon as I got home I joined.Thanks for the link.Talk to you soon.