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Winterize 2005 Mastercraft X-10 5.7L MPI Indmar MCX 350 Engine
I'm a first year boat owner, never done any of my own maintenance on any vehicle before. I paid easy 4 figures to shops in this first year of owning so I figured I'd learn to do some stuff on my own (all this was actually pretty easy). After a lot of reading and watching videos I created this for myself but thought I'd share as I'm sure it could be helpful to others. Please let me know if there is anything to correct or if you just see anything in the boat that might need some work! Thanks! PS- I'm doing my best to be overly "keyword" inclusive because the search function on this forum is garbage.
Pictures included for most, videos linked for some.
Step 1 (required winterization) – Put Sta-bil 360 Marine Ethanol Treatment & Stabilizer in gas tank, then fill to full with gas (this type of sta-bil says 1 oz per 10 gallons)
Step 2 (required winterization) – Remove engine panels so you have room to work
Step 3 (optional maintenance) – Perform oil change (every 50 hours or annually) with cheap pump off amazon (linked)... 5.5 quarts of 15w40 Diesel Engine Oil. Choice Oil Filter: Mobil 1 M1-302a
Step 4 (optional maintenance) – Perform transmission fluid oil change (every 100 hours or 2 years) with same pump... 4.2 quarts of 15w40 Diesel Engine Oil. Clean/reuse the filter. I have the MC ZF Hurth V-Drive ZF 63IV transmission.
Step 5 (required winterization) – Drain the block, hoses, strainer, etc. to remove all water from engine. I don't have a heater but if you do see the linked winterization video.
Step 6 (required winterization) – Remove any ballast bags. Fill hard ballast tanks/pumps/lines with RV Antifreeze... $3 per gallon at Walmart
Step 7 (optional maintenance) – Replace the raw water pump impeller (every 100 hours or 2 years)... Johnson 09-812B-1 Impeller
Step 8 (optional maintenance) – Replace the 3 ballast pump impellers (every 100 hours or 2 years)... Jabsco 6303-0107-J Impeller
Step 9 (required winterization) – Remove the batteries from the boat and store inside until ready to boat
Step 10 (optional winterization) – Remove spark plugs, spray fogging oil into each cylinder, replace spark plugs. (I opted to skip this... but see winterize mcx and spark plug videos linked below)
Step 11 (optional winterization) – Run RV Antifreeze into engine in place of water (I opted to skip this... but see winterize mcx video linked below)
Helpful Links:
Engine Oil Change Video - https://www.youtube.com/watch?v=rDFdUe0b6lk
Trans Fluid Oil Change Video - https://www.youtube.com/watch?v=0gWpfrA8dLk&t=5s
Replace Raw Water Impeller Video - https://www.youtube.com/watch?v=kYJGlFqtRTg
Replace Spark Plugs Video - https://www.youtube.com/watch?v=74gP8X3Lnqk&t=11s
Winterize MCX (slightly different engine than mine) - https://www.youtube.com/watch?v=MDWl_jeHYhs
2005 MC Owners Manual - https://www.mastercraft.com/media/w3...ers_manual.pdf
2005 Indmar Engine Owners Manual - https://www.indmar.com/wp-content/up...ors-Manual.pdf
Steps 1-9 Supply/Tool List:
- Stabil 360 Marine Ethanol Treatment and Stabilizer
- Oil Change Pump Extractor: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
- ¼ in ID x ¼ in FIP hose attachment ($3 at Home Depot)
- Spare car/marine/rv battery to run extractor pump
- Oil pan (minimum 2 gallon) or reservoir to hold/recycle old oil
- Choice Oil Filter: Mobil 1 M1-302a (same size as OEM but longer for more protection)
- Large ziplock/trash bag for catching old oil filter
- Phillips and flathead screw drivers
- Large and small funnels
- Adjustable wrench
- 6mm, 8mm, and 1/4 sized allen hex wrenches
- 10 quarts of 15w40 Diesel Engine Oil (5.5 for engine, 4.2 for transmission)
- 5/16, 9/16, and 1/2 sized socket wrenches
- 4 gallons RV Antifreeze (2 for each hard ballast tank)
- Cheap pour easy system as shown in step 6b picture
- Johnson 09-812B-1 Impeller (for raw water pump)
- 3 of Jabsco 6303-0107-J Impeller (for each ballast pump)
Some Notes:
- On step 6a you can also just rig something up to shove a smaller hose inside of the vent hole on the side of your boat to get the antifreeze in that way. I had trouble with this because my vent hoses seem to go up (meaning the antifreeze poured right back out at me) before they go down towards the tank. How do you know which one is the vent hose? If you blow into each hole, bilge and emptying lines will be hard (no room to take air), and the vent line will take the air and then blow it back at you almost like a breath.
- For steps 3, 4, and 7 do watch the videos (I did not make them but they are very helpful and will piece everything together easily)
- I'd recommend figuring out EXACTLY which engine you have as most people here seem to just say "oh I have the MCX 350" when in reality there are a variety of them (they are very similar but have subtle differences between year, fluid capacities, things of that nature). Go to the linked Indmar Owners Manual and figure out which one you have. My 2005 engine has a plaque on the top that says "MasterCraft Extreme 350 M.P.I. MCX Vortec H.O." and I have a MC ZF Hurth V-Drive ZF 63IV transmission as far as I can tell.
I'm a first year boat owner, never done any of my own maintenance on any vehicle before. I paid easy 4 figures to shops in this first year of owning so I figured I'd learn to do some stuff on my own (all this was actually pretty easy). After a lot of reading and watching videos I created this for myself but thought I'd share as I'm sure it could be helpful to others. Please let me know if there is anything to correct or if you just see anything in the boat that might need some work! Thanks! PS- I'm doing my best to be overly "keyword" inclusive because the search function on this forum is garbage.
Pictures included for most, videos linked for some.
Step 1 (required winterization) – Put Sta-bil 360 Marine Ethanol Treatment & Stabilizer in gas tank, then fill to full with gas (this type of sta-bil says 1 oz per 10 gallons)
Step 2 (required winterization) – Remove engine panels so you have room to work
Step 3 (optional maintenance) – Perform oil change (every 50 hours or annually) with cheap pump off amazon (linked)... 5.5 quarts of 15w40 Diesel Engine Oil. Choice Oil Filter: Mobil 1 M1-302a
Step 4 (optional maintenance) – Perform transmission fluid oil change (every 100 hours or 2 years) with same pump... 4.2 quarts of 15w40 Diesel Engine Oil. Clean/reuse the filter. I have the MC ZF Hurth V-Drive ZF 63IV transmission.
Step 5 (required winterization) – Drain the block, hoses, strainer, etc. to remove all water from engine. I don't have a heater but if you do see the linked winterization video.
Step 6 (required winterization) – Remove any ballast bags. Fill hard ballast tanks/pumps/lines with RV Antifreeze... $3 per gallon at Walmart
Step 7 (optional maintenance) – Replace the raw water pump impeller (every 100 hours or 2 years)... Johnson 09-812B-1 Impeller
Step 8 (optional maintenance) – Replace the 3 ballast pump impellers (every 100 hours or 2 years)... Jabsco 6303-0107-J Impeller
Step 9 (required winterization) – Remove the batteries from the boat and store inside until ready to boat
Step 10 (optional winterization) – Remove spark plugs, spray fogging oil into each cylinder, replace spark plugs. (I opted to skip this... but see winterize mcx and spark plug videos linked below)
Step 11 (optional winterization) – Run RV Antifreeze into engine in place of water (I opted to skip this... but see winterize mcx video linked below)
Helpful Links:
Engine Oil Change Video - https://www.youtube.com/watch?v=rDFdUe0b6lk
Trans Fluid Oil Change Video - https://www.youtube.com/watch?v=0gWpfrA8dLk&t=5s
Replace Raw Water Impeller Video - https://www.youtube.com/watch?v=kYJGlFqtRTg
Replace Spark Plugs Video - https://www.youtube.com/watch?v=74gP8X3Lnqk&t=11s
Winterize MCX (slightly different engine than mine) - https://www.youtube.com/watch?v=MDWl_jeHYhs
2005 MC Owners Manual - https://www.mastercraft.com/media/w3...ers_manual.pdf
2005 Indmar Engine Owners Manual - https://www.indmar.com/wp-content/up...ors-Manual.pdf
Steps 1-9 Supply/Tool List:
- Stabil 360 Marine Ethanol Treatment and Stabilizer
- Oil Change Pump Extractor: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
- ¼ in ID x ¼ in FIP hose attachment ($3 at Home Depot)
- Spare car/marine/rv battery to run extractor pump
- Oil pan (minimum 2 gallon) or reservoir to hold/recycle old oil
- Choice Oil Filter: Mobil 1 M1-302a (same size as OEM but longer for more protection)
- Large ziplock/trash bag for catching old oil filter
- Phillips and flathead screw drivers
- Large and small funnels
- Adjustable wrench
- 6mm, 8mm, and 1/4 sized allen hex wrenches
- 10 quarts of 15w40 Diesel Engine Oil (5.5 for engine, 4.2 for transmission)
- 5/16, 9/16, and 1/2 sized socket wrenches
- 4 gallons RV Antifreeze (2 for each hard ballast tank)
- Cheap pour easy system as shown in step 6b picture
- Johnson 09-812B-1 Impeller (for raw water pump)
- 3 of Jabsco 6303-0107-J Impeller (for each ballast pump)
Some Notes:
- On step 6a you can also just rig something up to shove a smaller hose inside of the vent hole on the side of your boat to get the antifreeze in that way. I had trouble with this because my vent hoses seem to go up (meaning the antifreeze poured right back out at me) before they go down towards the tank. How do you know which one is the vent hose? If you blow into each hole, bilge and emptying lines will be hard (no room to take air), and the vent line will take the air and then blow it back at you almost like a breath.
- For steps 3, 4, and 7 do watch the videos (I did not make them but they are very helpful and will piece everything together easily)
- I'd recommend figuring out EXACTLY which engine you have as most people here seem to just say "oh I have the MCX 350" when in reality there are a variety of them (they are very similar but have subtle differences between year, fluid capacities, things of that nature). Go to the linked Indmar Owners Manual and figure out which one you have. My 2005 engine has a plaque on the top that says "MasterCraft Extreme 350 M.P.I. MCX Vortec H.O." and I have a MC ZF Hurth V-Drive ZF 63IV transmission as far as I can tell.
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