Mercruiser alpha one water pump test

I was originally told the I didnt need to put the ear muffs on the outdrive just the toilet plunger on the seawater inlet. Insert a 1-2 section of clear water hose between the Tstat and the water inlet hose and look for air bubbles.

Mercruiser Alpha One Gen I Water Pump Impeller Replacement - YouTube.

Mercruiser alpha one water pump test. In this tutorial we will show you how to service Mercruiser Alpha 1 Gen 2 lower unit and the water pumpComplete Mercruiser Alpha 1 pump kit. Received 1 Vote on 1 Post. The water pump is located inside the drive on the same shaft that ultimately turns the prop.

The bump you heard could be the u-joint or gear failing at the top of the drive. Start it and immediately put it in gear. Dont run it for more than 15 seconds if its not pumping water.

2010 43L TKS closed cooling system belt driven seawater pump Alpha One stern drive. The engine cooling system is working great but how do I tell if the pump in the outdrive is working correctly. I bought the boat used.

I was originally told the I didnt need to put the ear muffs on the outdrive just the toilet plunger on the seawater inlet. Insert a 1-2 section of clear water hose between the Tstat and the water inlet hose and look for air bubbles. If you see them then exhaust is entering the water stream at the impeller.

Use a laser thermal temp. Gun to check temps on the. I have a 06 mercruiseralpha with a closed cooled system went to run it after 2 weeks and it overheated no water to the heat exchanger the pump on the sterndrive is working the impeller on the engine.

Replaces Mercruiser OEM number 817275T4. Includes upper housing stainless steel water pump housing PN 12413 Generation 2 - Mercruiser 1991 and up SN OD469859 and up. 11071 Key Alpha 1 1991 up.

11071 Alpha One Generation 2 replacement key Mercruiser OEM number 28-43037. 5 seconds without water is enough to damage the impellerMaking sure it will start without water is enough time for damageIf this started from a pump repair make sure the base gasket is not reversedThere have also been a batch of. The Alpha One and R pumps have a plastic upper housing and the Gen 2 drives have a Stainless housing.

Remove the housing nuts andor screws and lift the housing off the shaft. Remove the impeller the key and the wear plate. The Alpha One and the R drives have plastic water pump bases.

We strongly recommend that you replace the water pump base. The water as in the video has already circulated around the engine and you generally replace the gasket and o-ring as a set when maintaining the gimbal bearingit would be better to make sure it stays cool by replacing the impellor on a bi yearly event as this is what picks the water up and sends it via the inboard water pump to circulateyour drive looks in good physical. Mercruiser Alpha One Gen I Water Pump Impeller Replacement - YouTube.

The water pump base Alpha One and R only has two critical driveshaft seals which go bad so just replace the dam thing. To remove the plastic water pump base pry up from both sides with two flat screw drives and it should pop right up. Usually when you have a bad water pump impellar the engine will overheat at both low speed and high speed.

If you are under way and see your temp gauge too hot and you pull back to idle at slow speed and the temp stay hot or gets even hotter after idling for a while chances are good you have a bad water pump impellar provided the water intake is clear of debris. Pressure testing a Mercruiser Alpha 1 Gen 2 Upper - YouTube. Therefore the easiest way to identify a raw-water problem is to check whether the engine overheating is combined with excessive temperatures on the outlet side of the raw-water system.

If the raw-water side is to blame there could be three basic reasons. Restrictions on the inlet side of the raw-water pump. New Sierra 18-3320 water pump kit for Alpha 1 Gen 1 MR outdrives.

Fits alpha ones and Mr without preload pin. GLM 12120 Mercruiser 46-44292A5 46-96148A8 Mallory Marine 9-48307 For Alpha ones and MR SN. 46-96148T1 Pump Housing 32435-1 Wear Plate 23-29804T Guide Tube 25-30271 Slinger 27-85608-1 Gasket.

The water pump base Alpha One and R only has two critical driveshaft seals which go bad so just replace the dam thing. To remove the plastic water pump base pry up from both sides with two flat screw drives and it should pop right up. 90-806534970 1096 Alpha One Generation II Sterndrive 2 - 1 Installation Specifications Torque Specifications NOTE.

Securely tighten all fasteners not listed below. Nm Exhaust Pipe to Gimbal Housing Screws 23 31 Propeller Nut 1 55 75 Steering Cable Coupler Nut Tighten Nut Until It Bottoms Out Against Flat Washer. Water Pump Failures Question.

My Mercruiser Marine Engine suddenly started overheating to the point Im afraid to run the engine. I watched your video on replacing the water pump impeller and in fact narrowed my problem down to a failed water pump impeller on my 807151A14 water pump impeller. However after replacing the impeller the engine is still.

Models with sterndrive Alpha mounted seawater pump remove the water inlet hose which is between the gimbal housing water tube and the engine and replace with another hose of the same diameter but approximately 1 m 3 ft longer. The hose should be of adequate wall thickness to prevent it from kinking when performing the test. Jun 06 Re.

Mercruiser IO engine fresh cooling system 1You will have to remove to water pump from the outdrive. Your motors water pump will be used with the new cooling system. 2 yesYour car has a closed cooling system look at it that way.

3 If you are running on fresh waternoneSTANDARD COOLING SYSTEM - Mercruiser L ALPHA TS Crowley. The Alpha One Water Pump Kit is Mercury Number 46-96148A8 for about 4900 You should also replace the Alpha Pump Base too Part 46-44292A3 for 3200 If you have an older R-Style pre-alpha then you will still use the Alpha One Water Pump Kit.