MERC 5.7 Counter-Rotation Starter P/N ??? SOLVED!!

[LOBOATOMY]

As the title suggests I need the part number for a Merc (5.7) Reverse Rotation (RH) BOTTOM MOUNT Starter.
Any help greatly appreciated,
Thank you

 

[Shlbyntro]

I'm not sure I've ever seen one in person. if you have an engine SN I can look it up for you. every counter rotater I've ever come across has had a high mount starter

 

[LOBOATOMY]

Thank you but Boat is in Florida. Yes it's easy to find top mount. Problem is no room for top mount, it has a bottom mount in it now but I was trying to get a head start and order the part before removing the old. If no other choice I will need to remove and get part number then order and wait.

Thank you,
Gary

 

[obnoxious001]

Might be a better option than this, perhaps look up starter/alternator rebuilding shops near the boat. Probably only clean up, brushes and bearings/bushings and a new solenoid.

CHEVROLET Tilton Engineering 54-41001 Tilton Severe-Duty Super Starters | Summit Racing

Free Shipping - Tilton Severe-Duty Super Starters with qualifying orders of $109. Shop Starters at Summit Racing.

www.summitracing.com

 

[obnoxious001]

Ran into the selection at Hardin/CP. They have a bunch of reverse rotation Chevy starters.

Hardin Marine - Chevy

Chevy

www.hardin-marine.com

 

[LOBOATOMY]

Thank you Berry, the answer was right under my nose.

 

[mesquito_creek]

I have a pair of 5.7 in my cruiser with a counter rotation motor on the port side. Nothing in the engine is different, all the counter rotation in in the lower unit of the out drive. Here are the part numbers out of the service manual.

 

[LOBOATOMY]

View attachment 1329100 View attachment 1329101 View attachment 1329102 I have a pair of 5.7 in my cruiser with a counter rotation motor on the port side. Nothing in the engine is different, all the counter rotation in in the lower unit of the out drive. Here are the part numbers out of the service manual.

Then you DON'T have a counter rotating engine. This is a shaft drive with a B/W trans. It is truly a RH rotation motor.

Thanks to Berry I will be ordering the starter from Hardin.
Thank you for you input and help to all.

 

[Shlbyntro]

Then you DON'T have a counter rotating engine. This is a shaft drive with a B/W trans. It is truly a RH rotation motor.

Thanks to Berry I will be ordering the starter from Hardin.
Thank you for you input and help to all.

when you get to FL post a picture. I'm normally cussing at the pulley side of an inboard engine space wise, and not the "back"

you have my curiosity!

 

[mesquito_creek]

Then you DON'T have a counter rotating engine. This is a shaft drive with a B/W trans. It is truly a RH rotation motor.

Thanks to Berry I will be ordering the starter from Hardin.
Thank you for you input and help to all.

I read P/N as “pin” because of the all caps title and thought you were looking for a bolt or bracket part number… mistake on my part.

 

[LOBOATOMY]

Here is a picture of the problem, originally we were going to replace with ARCO top mount but ran into this problem.
This is a 28' Offshore fishing boat with twin 350's and BW 72's. We are replacing all of the possible reliability issues while on land. We plumbed in closed cooling and new engine and trans coolers but did not leave enough space in anticipation of the starters. We will be suffering with your problem and pully interference next week.

 

[LOBOATOMY]

I read P/N as “pin” because of the all caps title and thought you were looking for a bolt or bracket part number… mistake on my part.

no problem all caps was an oversight on my behalf. Thanks anyway.

 

[Fun Times]

Thank you Berry, the answer was right under my nose.

May I ask what part number you plan to order?

Just want to be careful because a lot of the Replaces Merc #"s 50-12121A 2, 50-12177A 2, 50-806964A 3, A 4 50-812428A 3, 50-812604A 2, 50-99418A 2 tend to seemingly superseded to a standard rotation Merc number 50-863007A1 Starter Motor Assembly.

Mercury-Mercruiser 50-863007A1 Starter Motor Assembly

Mercury-Mercruiser 50-863007A1 Starter Motor Assembly genuine factory part not aftermarket. Fast shipping - Click here to see live inventory status

www.mercruiserparts.com

Plue the possibility of the following,
If you are replacing an older unit you will need the folllowing parts.

2 pieces 10-8053432 BOLT .375-16 X 4.33

1 piece 11-400211 NUT (M5) STAINLESS STEEL

1 piece 11-806949 NUT (M8-1.5)



Just want to make sure you saw the helpful guides inside the right links before ordering,

Inboard Starter, Mercruiser OMC Volvo Penta - Hardin Marine

Inboard Starter, Mercruiser OMC Volvo Penta

www.hardin-marine.com

View API Inboard Starter Catalog
OEM to API Part Number Cross Reference

We're here to help better if possible.

 

[LOBOATOMY]

May I ask what part number you plan to order?

Just want to be careful because a lot of the Replaces Merc #"s 50-12121A 2, 50-12177A 2, 50-806964A 3, A 4 50-812428A 3, 50-812604A 2, 50-99418A 2 tend to seemingly superseded to a standard rotation Merc number 50-863007A1 Starter Motor Assembly.

Mercury-Mercruiser 50-863007A1 Starter Motor Assembly

Mercury-Mercruiser 50-863007A1 Starter Motor Assembly genuine factory part not aftermarket. Fast shipping - Click here to see live inventory status

www.mercruiserparts.com

Plue the possibility of the following,
If you are replacing an older unit you will need the folllowing parts.

2 pieces 10-8053432 BOLT .375-16 X 4.33

1 piece 11-400211 NUT (M5) STAINLESS STEEL

1 piece 11-806949 NUT (M8-1.5)



Just want to make sure you saw the helpful guides inside the right links before ordering,

Inboard Starter, Mercruiser OMC Volvo Penta - Hardin Marine

Inboard Starter, Mercruiser OMC Volvo Penta

www.hardin-marine.com

View API Inboard Starter Catalog
OEM to API Part Number Cross Reference

We're here to help better if possible.

I saw that, a bit deceiving, we are going with the API 10071 LH from Hardin Marine.

Thanks for the keen eye.

 

[obnoxious001]

Then you DON'T have a counter rotating engine. This is a shaft drive with a B/W trans. It is truly a RH rotation motor.

Thanks to Berry I will be ordering the starter from Hardin.
Thank you for you input and help to all.

Glad I could help. Chevy is a Chevy in most cases, even it it says "Mercruiser" on it. Obviously the counter rotation is important, I have not dealt with too many of them.

 

[LOBOATOMY]

Hardin has discontinued that starter so it took a little more time and research but I finally got it all sorted and sourced out.
Thank you.

 

[n2otoofast4u]

I’ve never paid attention to our cruiser if the counter rotating propeller is on a counter rotating motor. I always assumed the direction change was done in the Vdrive. I’ll have to look when I change the oil next time. It is also 5.7s.

 

[rivermobster]

Glad I could help. Chevy is a Chevy in most cases, even it it says "Mercruiser" on it. Obviously the counter rotation is important, I have not dealt with too many of them.

Oh but they are So much fun!!!

Not...