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Bt Doctur replied to the thread What is this reservoir for? Coolant? Where does the line run to?.

and if empty you have a leak that needs fixing

Jun 30, 2025
Bt Doctur replied to the thread Harmonic Balancer pulley of Mercruiser 3.0 replacement.

running the serial numbers you list there both bolt on pullys

Jun 30, 2025
Bt Doctur replied to the thread Can't trim up ?.

If you can trailer up the pump and solenoids are working ,whats not working is the trim limit switch on the transom. Locate the black...

Jun 30, 2025
Bt Doctur replied to the thread Alpha I SN6749102 Outdrive Lower Unit. Can't lock prop in FWD to re-attach to Upper.

If you rotate the prop ccw in fwd then the drive shaft should be turning ccw also. If this is not the case the lower unit is somehow...

Jun 30, 2025
Bt Doctur replied to the thread Alpha I SN6749102 Outdrive Lower Unit. Can't lock prop in FWD to re-attach to Upper.

I used vice grips to turn the drive shaft and break it free, and now it turns easily clockwise and CCW. Should not turn easily because...

Jun 29, 2025
Bt Doctur replied to the thread Impeller replacement after engine overheating - 3.0L Mercruiser.

impeller is toast along with the top cover, One item looks like part of a exaust shutter

Jun 29, 2025
Bt Doctur replied to the thread 1988 Alpha one Gen one lower unit.

moisture in the gear oil is not good, if the unit was drained and left empty the bearings could have rusted. Remove the pump top...

Jun 25, 2025
Bt Doctur replied to the thread Engine water flow issue.

Impeller - brand new (key is in it, lol) it spins freely with the shaft Once installed in the housing its very hard to just turn by...

Jun 24, 2025
Bt Doctur replied to the thread 1988 Alpha one Gen one lower unit.

oil based products will destroy rubber. If you removed the impeller and it still wont turn the lower unit is damaged

Jun 22, 2025
Bt Doctur replied to the thread 89. Mercruiser engine swap problems.

#1 cylinder on compression stroke, rotate engine until timing mark on balancer is at at 6 degrees, install dist pointing to #1 in the...

Jun 22, 2025
Bt Doctur replied to the thread Coupler alignment.

all depends on your front motor mounts, how you removed the old engine and how you swapped the motor mounts to the new motor It your...

Jun 20, 2025
Bt Doctur replied to the thread Lower gear oil drain plug seal for Johnson outboard.

a impact is the worst thing to do

Jun 17, 2025
Bt Doctur replied to the thread alpha one gen 2 bellhousing broke at exhaust bellow mount (nipple?).

you sure its a bellow and not a sleeve?

Jun 15, 2025
Bt Doctur replied to the thread 1986 Four Winns Horizon 190, Carb Linkage?.

a Rochester normal operation is primary with a choke plate, the plate in the rear is the secondary and the actual throttle plates that...

Jun 14, 2025
Bt Doctur replied to the thread Emergency Starter Solenoid.

its a solenoid crossover to connect the batterys together for emergency starting. A isolated base solenoid will do the job

Jun 14, 2025

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