Speed limited Blackhawk

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07-08-2019 | 07:54 AM

#11

speicher lane

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Joined: Jul 2007

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Quote:

Originally Posted by TomZ

Story of my life!!

Cheaper and more effective than a therapist

07-08-2019 | 07:57 AM

#12

TomZ

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Joined: Feb 2001

Posts: 4,295

Likes: 1,457

From: Virginia Beach

Quote:

Originally Posted by speicher lane

Cheaper and more effective than a therapist

Agreed! Best money I’ve spent!

07-08-2019 | 11:45 AM

#13

sandslot

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Joined: Sep 2016

Posts: 190

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From: Waterford, Michigan

Quote:

Originally Posted by speicher lane

By rights, the fuel tank should have been drained and system flushed (4-5 years little use).. dirty fuel only creates bad burn and detonation.... and headaches.

What condition is your ignition system in - plugs, caps and wires? they will rob you rpm on top of the weak fuel

the cap, plug and wires look good. Plugs overall good. I did check compression and a few cylinders were around 140....but nothing really wrong.

Once i I know the overall operation of the engine is good (from a sensor/wiring, etc i plan to power up the engine (this winter). Nothing worse than carrying a problem into a new build. I suspect any overall speed concern or gap will go away afterwards!

07-08-2019 | 11:46 AM

#14

sandslot

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Joined: Sep 2016

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From: Waterford, Michigan

Quote:

Originally Posted by Rookie

Prop size? What did it usually run? This setup has performed properly in the past?

yep, nothing has changed from original..

07-08-2019 | 11:48 AM

#15

sandslot

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Joined: Sep 2016

Posts: 190

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From: Waterford, Michigan

Quote:

Originally Posted by TomZ

You really should get those injectors out and cleaned/replaced. The quickest way to burn down one of these MPI set-ups is running with clogged/bad injectors. It’s a fairly easy job to do.

Reach out to oso member BUP. He can help you out with the injectors.

cleaning the injectors sounds like a good thing to do.... especially since the boat is running better each time I run it.

who is BUP

07-08-2019 | 11:49 AM

#16

sandslot

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Joined: Sep 2016

Posts: 190

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From: Waterford, Michigan

Quote:

Originally Posted by speicher lane

Fuel Injector Maintenance

for or some reason this link did not work...I’ll try later on my desktop

07-08-2019 | 02:37 PM

#17

Baja Rooster

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Joined: Oct 2013

Posts: 2,888

Likes: 148

From: SF Bay Area

Quote:

Originally Posted by speicher lane

B.O.A.T = Bring out another thousand...starts the season for maintenance, then turns into the fuel bill

Those are 1970’s prices. Now it’s B.O.A.T.T.

07-10-2019 | 03:47 PM

#18

Gimme Fuel

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Joined: Oct 2010

Posts: 922

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From: Hemlock, MI

Quote:

Originally Posted by TomZ

Do this ^^^^^^^ 10,000% correct. Dare you to ask me how I know haha. The fuel injectors in these Merc motors are horrible, especially when laid up for long periods. I have same motors and an injector that flowed 24% low roasted my piston and ruined my day and month. Engine even "felt" like it was running "good" too!