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Forum: Fuel System

03-15-2017, 03:59 PM

Replies: 28

Sticky: Sooty Plugs Create Problems

Views: 49,048

Posted By macgyro

Similar symptoms, no exhaust blockage

Hi guys,

I know this thread has been inactive for a while, but the symptoms described were exactly what I was experiencing at the end of last season. My RPM wouldn't go above 1800 RPM and it...

Forum: Cooling System

01-29-2016, 01:09 PM

Replies: 38

Sticky: New MMI Flexible Impeller Pump

Views: 64,304

Posted By macgyro

Which direction to bend the blades of the impeller?

I'm replacing my water pump impeller after an unknown number of hours on the new (to this boat) used engine. I'm curious if the blades in the attached photo are bent in the correct direction? This...

Forum: Cooling System

09-04-2015, 09:39 AM

Replies: 7

Cooling system troubleshooting

Views: 8,565

Posted By macgyro

sounds like good advice

I did check the impeller and it looked okay. One of the fasteners was loose, but after tightening it, it did not resolve the problem.

I pulled the thermostat out while the engine was warm and...

Forum: Cooling System

09-03-2015, 08:44 AM

Replies: 7

Cooling system troubleshooting

Views: 8,565

Posted By macgyro

maintenance

It's a RWC in what is mostly fresh water/slightly brackish.

Did a vinegar flush last fall before winterizing the engine. No acid flushes that I know of.

The impeller may be original. I think...

Forum: Cooling System

09-02-2015, 09:54 PM

Replies: 7

Cooling system troubleshooting

Views: 8,565

Posted By macgyro

Cooling system troubleshooting

Hi everyone, I know this has been discussed before, but I need some advice.

My engine went from operating at a normal 160-180 degrees depending on if the thermostat was open or closed, then...

Forum: Overhaul

11-15-2014, 08:38 PM

Replies: 14

Remanufactured Late Model Starter

Views: 7,449

Posted By macgyro

Starter fluid help

Had to do that once to my cold engine in gale force winds when the toothed flywheel ring shifted, and the starter motor wouldn't engage the flywheel. A quick removal of two trim panels, a squirt of...

Forum: General Maintenance

10-23-2014, 08:01 PM

Replies: 112

Sticky: Winterizing your Atomic 4

Views: 168,853

Posted By macgyro

Used similar

I've used similar antifreezes, popular opinion is that IF you dilute it with water, to shake it up real good before putting it in the engine, because people in the past have just added water and the...

Forum: Electrical

10-01-2014, 09:09 PM

Replies: 25

Sticky: A4 Electrical Wiring Schematic

Views: 83,119

Posted By macgyro

Fuses in the diagram

Hey guys!
Quick Question. I'm having trouble finding the right fuse (40A) to run between the alternator and battery/ammeter. I've eliminated my ammeter because it was quite corroded, and run...

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