Mallery Distributor (Vacumume Advance????)

[kitacooch]

Hi there, i bought a 35" bayliner avanti with twin 454's, it has had Hi-teck manifolds and Mallery Distributors fitted. The vacume advance has not been hooked up and wondering why this might be. Do they not require the vacume advance or has this been an oversight. The previouse owner is non contactable. Everything is there all i need to do is run the hose.

Oh and am having trouble getting on the plane, fully loaded with fuel and water and 5 adults, trim tabs fully extended, takes approx 1 min to get onto plane, was suggested to me that quite normal to have to ask passengers to go up front when trying to plane.

Could the vacume advance not being hooked up be a part of the problem???


Thanks in advance.

 

[kitacooch]

35" Bayliner Avanti Twin 454's 1 min + To Plane Is This Normal??

35" Bayliner Avanti Twin 454's 1 min + To Plane Is This Normal??

Hi there, i bought a 35" bayliner avanti with twin 454's, it has had Hi-teck manifolds and Mallery Distributors fitted. I and am having trouble getting on the plane, fully loaded with fuel and water and 5 adults, trim tabs fully extended, takes approx 1 min to get onto plane, was suggested to me that quite normal to have to ask passengers to go up front when trying to plane.

Just wondering if this sounds normal.

Am carrying maybe 1000L fuel, 200L water under helm, genset is positioned between the 2 big blocks so have a lot of weight towards the rear.

Carby's are fine too by the way, averhauled and tuned.

Also noticed the swim platform sits pretty low, seems to drag a bit when trying to get up, maybe this not helping also??

Any input be much appreciated.

Thanks in advance.

 

[Brentathon]

Re: 35" Bayliner Avanti Twin 454's 1 min + To Plane Is This Normal??

Re: 35" Bayliner Avanti Twin 454's 1 min + To Plane Is This Normal??

I would think that a simple test, is to make sure you're operating in the specified rpm range at wide open throttle. If there was some kind of load, power, engine, or prop issue, it should show up at this test.

 

[Don S]

Re: Mallery Distributor (Vacumume Advance????)

For one thing, Marine distributors do not have vacuum advances on their distributors. Sounds to me like you have the wrong distributors. May be why you can't get on plane easily.
I am going to merge both your threads together, since both are asking the same questions.

 

[Bondo]

Re: Mallery Distributor (Vacumume Advance????)

it has had Hi-teck manifolds and Mallery Distributors fitted. The vacume advance has not been hooked up

Ayuh,... You've got the Wrong distributers, so I'm guessin' those "Hi-teck manifolds", whatever they might be, are possibly mis-matched as well...

 

[kitacooch]

Re: Mallery Distributor (Vacumume Advance????)

MMM, whats the difference between marine and normal dizzies?
Why do marine not have vacume advance?
Why would a non marine be less effective than a non marine?

We are talking 88 model boat and motors.

 

[kitacooch]

Re: Mallery Distributor (Vacumume Advance????)

Oh and had a marine mechanic look at them today, he said the Hi Teck manifolds and the dizzies were typical for ski boats, and not normally found in this sort of boat. Also has raised cover (the engine cover between the 2 rocket covers) apparently normally flat/resessed but these are raised causing the carby to be atleast 4" higher than normal.

 

[Don S]

Re: Mallery Distributor (Vacumume Advance????)

MMM, whats the difference between marine and normal dizzies?
Why do marine not have vacume advance?
Why would a non marine be less effective than a non marine?

We are talking 88 model boat and motors.

Marine distributors are ignition protected (Spark protected) to prevent sparks inside the distributor from from igniting any fuel vapors in the bilge should a fuel leak of some kind develop.
The marine version also has different advance characteristics than automotive distributors.

 

[mkast]

Re: Mallery Distributor (Vacumume Advance????)

Oh and had a marine mechanic look at them today, he said the Hi Teck manifolds and the dizzies were typical for ski boats, and not normally found in this sort of boat. Also has raised cover (the engine cover between the 2 rocket covers) apparently normally flat/resessed but these are raised causing the carby to be atleast 4" higher than normal.

What does this mean?

 

[kitacooch]

Re: Mallery Distributor (Vacumume Advance????)

What does this mean?

Just trying to paint a picture so i can try to get to the root of my problem (struggleing to get on plane)
It has been suggested that i am running an Auto dizzy but not sure if this is the case or if so why.
As i have no way of contacting previouse owner who has mooved back to the states i am trying to work out what he has done and why, the marine mechanic i had take a look has not seen these dizzies before and so can't shed light on if they could be contribvuting to the problem or not.
How do i confirm 100% if the dizzies are marine or auto.

I am beginning to get a bit worried,
if auto dizzies then have an explosion risk
because of the raidsed covers and so raised carbies the previouse owner has fitted these tiny non restrictive breathers on the carbies instead of the flame arresters/filters in order to fit under the hatch, another explosion risk.
Also found yesterday that blowers are missing, they are on order but whats the go, beginning to sound like a death trap.

Will try to post up a pic to see what you guys think.

cheers

 

[kitacooch]

Re: Mallery Distributor (Vacumume Advance????)

OK just had another chat with the marine mechanice and he has confirmed that it is infact an auto dizzy, what he doesn't know is if the vacume advance needs to be hooked up or not, if anyone would know please advise. And could this be a contributing factor to my planing issue??
He said not to worry too much about them being auto dizzies as would need to be pulling some seriouse revs to cause a spark????

 

[tswiczko]

Re: Mallery Distributor (Vacumume Advance????)

Every time the rotor passes by a post that the plug wire is hooked to there is a spark. Marine distributors are sealed not allowing vapors to enter and auto distributors are not sealed well enough and can allow the vapors in and "boom" :facepalm:and if your mechanic doesn't know if the vacuum advance needs hooked up then there is another reason to get a new mechanic

Also you may want to have the carbs rechecked if you had this mechanic do the work. Being that he doesn't mind using automotive parts he may have used a rebuild kit designed for an automotive carburetor which can leak vapors from around the accelerator pump. That combined with the automotive distributors you have and no ventilation fans you are an explosion waiting to happen !!!

That being said I would also start looking at the other electrical components on the engine like the starters and alternators to verify that they are marine grade as well.

I hate to sound like a tool, but if you are paying someone to work on your equipment then they should at least know what they are messing with and their lack of knowledge is putting your life and the lives of the people on your boat at risk.

The guys that already posted before me are more experienced mechanics than I am.
They wouldn't tell you it's a safety issue if there were not one.

good luck.

 

[K-2]

Re: Mallery Distributor (Vacumume Advance????)

They should be mechanical advance not vacum advance.
You are probably not getting any advance at all.
Easy way to find out, get a timing light that tells you how much advance
you are getting as the engine revs up.
And yes, no advance will make your boat a pig.

 

[HT32BSX115]

Re: Mallery Distributor (Vacumume Advance????)

OK just had another chat with the marine mechanice and he has confirmed that it is infact an auto dizzy, what he doesn't know is if the vacume advance needs to be hooked up or not,

I hate to sound like a tool, but if you are paying someone to work on your equipment then they should at least know what they are messing with and their lack of knowledge is putting your life and the lives of the people on your boat at risk.

Um. No. You're not sounding like a tool. If a "Marine Mechanic" says he doesn't know if the vacuum advance should be hooked up or not, He's NOT a COMPETENT Marine mechanic.

Bondo's right. You have the wrong distributors. It also appears that you have the wrong mechanic too.....



Sorry about that,



Rick

 

[Bondo]

Re: Mallery Distributor (Vacumume Advance????)

He said not to worry too much about them being auto dizzies as would need to be pulling some seriouse revs to cause a spark????

Ayuh,... That guy's a Moron...

Find another Mechanic, cause he Ain't 1...

 

[HT32BSX115]

Re: Mallery Distributor (Vacumume Advance????)

He said not to worry too much about them being auto dizzies as would need to be pulling some seriouse revs to cause a spark????

Caveat Emptor.....

ok, I guess the above is in general accurate ("Let the buyer beware")

More accurately it should be

"Let the Boat Owner Beware"!!

Right from GOOoogle-Translate!!!

Navis Dominus Sit Cavendum

 

[achris]

Re: Mallery Distributor (Vacumume Advance????)

Vacuum advance comes into play when a AUTOMOBILE reaches cruising speed and the throttle is backed off. This never happens in a boat because if you back the throttle off, you slow down. Also the mechanical advance (centrifugal weights inside the dissy body) are set up with a different advance curve.

I also agree with everybody else in that the mechanic you are dealing with has less knowledge than the tools he is using.

The best thing you can do to get those engines running right is to sack the 'mechanic' and return the engines to as close to standard (manifolds, carbs, distributors) as you can. It will cost some, but nobody said boating was cheap.

Good luck (I think you're going to need it)....