Question about Boating

1 Answer

My 5 litre 305 mercruiser surges at midrange like I'm pumping the throttle. It's a 98 Larson boat I/0 carbureted.

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 352 Answers


Posted on Jul 21, 2013

  • 1 more comment 
  • Troy Sellner Jul 22, 2013

    Thanks for reply. How do I check the output of the fuel pump? It is an electric inline.

  • Jeffrey Geyer
    Jeffrey Geyer Jul 24, 2013


  • Troy Sellner Jul 26, 2013

    Turns out it was the anti syphon valve on the tank. Cleaned valve and runs great. Thanks.



2 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Mercruiser 5.7 litre inboard engine Impeller fault

i have a 5.7 v8 4brl in my boat with top water exhaust and my valve cover filter tubes are sendig excessive moisture into my carb . why

Posted on Apr 20, 2010

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

I have a 1998 sea ray boat

If Mercruiser its corrosion at pump/relays.

Jun 17, 2017 | Boating

1 Answer

Why is it hard to start my Mercruiser 7.4L MPI after a hot run?

Electric choke? Try retrofitting a manual choke. I think the electric choke is closing over a hot engine, thinking that the engine's cooler than it really is. A manual choke will allow you to start it with no choke at all when you know the motor's already warmed up.

Jul 25, 2014 | Mercury Marine Mercruiser 350 - 454 - 5.7...

1 Answer

I have a boat its a larson lazor its got the 5.7 350 with the cobra outdrive i took it out for the first time and it overheated what could cause this?

probably the cooling system. take a look at the radiator, water pump and all hoses. you might want to do a pressure test as well if you notice that there is not enough coolant in the system.

May 02, 2014 | Boating

1 Answer

Location of water pump in a 2002 5.7 mercruiser in my boat

In the lower unit there is on and on the front of the engine block is another.

Jul 20, 2013 | Mercury Impeller, Water Pump - MerCruiser...

1 Answer

My Prop On My Larson Boat With A Mercruiser Alpha 1 Drive & A 5.7 Liter Engine Won't Turn The Prop In Forward Or Reverse. When The Engine Is Off & It Is Shifted Into Forward The Prop Can B

run the engine and watch the drive shaft behind the engine , is it turning ? also as your mate selects forwad and reverse ! does it stop turning ? pos flywheel damper or output shaft damaged ! pos gearbox damaged !??

Jun 04, 2012 | Mercury Boating

2 Answers

Mercruiser 5.7 litre inboard engine Impeller fault

You could be right. Check your idle rpm to see if the motor DIESELS after shutdown. See if linkage and carb setting can be reduced for RPM. Last, check your timing. If it has springs in the distributor you should not see rust powder on pivot points. Binding would keep engine overadvanced at shutdown. Then basic timing could be off too.

Sep 21, 2009 | Boating

1 Answer

When we put boat in reverse in makes a banging noise.

If its a mercruiser 3.0 liter 4 cylinder motor, they are an old block design and will give a pretty healthy clunk when dropped into reverse. Especially if you are shifting from forward to reverse without stopping. Let the throttle hang in neutral for a minute before shifting into reverse.

Mar 28, 2009 | Boating

2 Answers

1971 Oldsmobile 350 Surging

Check for vacume leaks. Hoses and around intake gaskets.spray some carb cleaner around intake gaskets.

May 06, 2017 | 1985 Oldsmobile Delta 88

Not finding what you are looking for?
Boating Logo

Related Topics:

300 people viewed this question

Ask a Question

Usually answered in minutes!

Top Boating Experts


Level 3 Expert

693 Answers

ray gallant

Level 3 Expert

44265 Answers

Fabrice Wolters

Level 2 Expert

265 Answers

Are you a Boating Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides