1990 350 Sundancer head system

• Aug 24, 2019

• #1

Q

QT1

Active Member

Oct 20, 2016

647

Belair, MD

Boat Info

1990 350 Sundancer, "Quality Time II".

Engines

454 Mercruisers, performance parts modified by PO.

Water going into bowl, step on pedal, push pedal, water still filling bowl. Possible vacuum pump problem?

 

• Aug 24, 2019

• #2

Strecker25

Well-Known Member

SILVER Sponsor

Nov 20, 2014

4,917

Rochester, NY

Boat Info

2002 410DA

Engines

Caterpillar 350HP 3126

Probably. Is your pump running? Any vacuum when you flush? Should get a a good whoosh sounds and suck it through the bowl

Could be a clogged line or duckbills too

 

• Aug 24, 2019

• #3

Q

QT1

Active Member

Oct 20, 2016

647

Belair, MD

Boat Info

1990 350 Sundancer, "Quality Time II".

Engines

454 Mercruisers, performance parts modified by PO.

When flushing, there is no sound. I have heard of duckbills but not investigated what it's about. As far as clogged lines, where do you start?

 

• Aug 25, 2019

• #4

Q

QT1

Active Member

Oct 20, 2016

647

Belair, MD

Boat Info

1990 350 Sundancer, "Quality Time II".

Engines

454 Mercruisers, performance parts modified by PO.

Well, they always say, if it's something you need to learn, go to YouTube University!. Now I know what duckbills do and where they are located for replacement! Thanks for mentioning that Strecker. Hopefully the lines are not clogged. It could be a nasty job.

 

• Aug 25, 2019

• #5

Strecker25

Well-Known Member

SILVER Sponsor

Nov 20, 2014

4,917

Rochester, NY

Boat Info

2002 410DA

Engines

Caterpillar 350HP 3126

QT1 said:

Well, they always say, if it's something you need to learn, go to YouTube University!. Now I know what duckbills do and where they are located for replacement! Thanks for mentioning that Strecker. Hopefully the lines are not clogged. It could be a nasty job.

Click to expand...

yeah, put a bunch of fresh water down the line first if you can.

What about the electric pump motor though, is it running?

 

• Aug 25, 2019

• #6

Q

QT1

Active Member

Oct 20, 2016

647

Belair, MD

Boat Info

1990 350 Sundancer, "Quality Time II".

Engines

454 Mercruisers, performance parts modified by PO.

The water pump is the only thing you hear running when pressing the foot pedal.

 

• Sep 24, 2019

• #7

B

bobbarry

Member

Feb 19, 2016

31

South west Florida

Boat Info

Sea Ray 350 Sun Dancer, 1990

Engines

Mercruiser 454 with v-drives

Had the same problem on my '90' 350 dancer. You have 2 duck bills on the pump. Easy to replace. I got a dancer owners guide and the system should be discussed there.

 

• Sep 24, 2019

• #8

Q

QT1

Active Member

Oct 20, 2016

647

Belair, MD

Boat Info

1990 350 Sundancer, "Quality Time II".

Engines

454 Mercruisers, performance parts modified by PO.

bobbarry said:

Had the same problem on my '90' 350 dancer. You have 2 duck bills on the pump. Easy to replace. I got a dancer owners guide and the system should be discussed there.

Click to expand...

So here was the problem: The previous owner broke the end off the breaker switch for the water system and never mention it. I found it laying behind the distribution panel. pushed the plunger in, all systems go.