![ichiro-1500x1500](https://www.rhsboating.com.au/images/com_hikashop/upload/ichiro-1500x1500.jpg)  Choose Ichiro marine oils by the requirements of your engine and maintenance schedule. The range brings marine lubrication products into one category for straightforward comparison. Check the oil type, grade and stated performance specifications against the engine manufacturer's requirements. Selecting the correct lubricant matters more than matching container appearance or assuming all marine oils are interchangeable. Explore the Ichiro listings at RHS Boating & Marine for product details and available options.

           [ ![404650](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404650.jpg "Nairn 4 inch Inspection Port Lid Only Black – Boat Hardware – 404650") ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-black-boat-hardware-404650.html)

   $10.05  each    [ Nairn 4 inch Inspection Port Lid Only Black – Boat Hardware – 404650 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-black-boat-hardware-404650.html)      [ 404650 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-black-boat-hardware-404650.html)

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   [ ![404651](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404651.jpg "Nairn 4 inch Inspection Port Lid Only White – Boat Hardware – 404651") ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-white-boat-hardware-404651.html)

   $10.05  each    [ Nairn 4 inch Inspection Port Lid Only White – Boat Hardware – 404651 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-white-boat-hardware-404651.html)      [ 404651 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-lid-only-white-boat-hardware-404651.html)

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   [ ![404670](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404670.jpg "Nairn 4 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

   $3.86  each    [ Nairn 4 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)      [ 404670 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404601](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404601.jpg "Nairn 4 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

   $19.28  each    [ Nairn 4 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)      [ 404601 ](https://www.rhsboating.com.au/categories/nairn-4-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404610](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404610.jpg "Nairn 5 inch Inspection Port Black – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)

   $23.11  each    [ Nairn 5 inch Inspection Port Black – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)      [ 404610 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404656](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404656.jpg "Nairn 5 inch Inspection Port Lid Only Black – Boat Hardware – 404656") ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-black-boat-hardware-404656.html)

   $11.70  each    [ Nairn 5 inch Inspection Port Lid Only Black – Boat Hardware – 404656 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-black-boat-hardware-404656.html)      [ 404656 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-black-boat-hardware-404656.html)

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   [ ![404655](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404655.jpg "Nairn 5 inch Inspection Port Lid Only White – Boat Hardware – 404655") ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-white-boat-hardware-404655.html)

   $11.70  each    [ Nairn 5 inch Inspection Port Lid Only White – Boat Hardware – 404655 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-white-boat-hardware-404655.html)      [ 404655 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-lid-only-white-boat-hardware-404655.html)

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   [ ![404671](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404671.jpg "Nairn 5 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

   $4.33  each    [ Nairn 5 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)      [ 404671 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404611](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404611.jpg "Nairn 5 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

   $23.11  each    [ Nairn 5 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)      [ 404611 ](https://www.rhsboating.com.au/categories/nairn-5-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404620](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404620.jpg "Nairn 6 inch Inspection Port Black – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)

   $27.10  each    [ Nairn 6 inch Inspection Port Black – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)      [ 404620 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-black-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404660](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404660.jpg "Nairn 6 inch Inspection Port Lid Only Black – Boat Hardware – 404660") ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-black-boat-hardware-404660.html)

   $13.90  each    [ Nairn 6 inch Inspection Port Lid Only Black – Boat Hardware – 404660 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-black-boat-hardware-404660.html)      [ 404660 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-black-boat-hardware-404660.html)

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   [ ![404661](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404661.jpg "Nairn 6 inch Inspection Port Lid Only White – Boat Hardware – 404661") ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-white-boat-hardware-404661.html)

   $13.90  each    [ Nairn 6 inch Inspection Port Lid Only White – Boat Hardware – 404661 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-white-boat-hardware-404661.html)      [ 404661 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-lid-only-white-boat-hardware-404661.html)

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   [ ![404672](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404672.jpg "Nairn 6 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

   $5.67  each    [ Nairn 6 inch Inspection Port O-Ring – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)      [ 404672 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-o-ring-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![404621](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/404621.jpg "Nairn 6 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware") ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

   $27.10  each    [ Nairn 6 inch Inspection Port White – Boat Hardware – Boat Deck & Cabin Hardware ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)      [ 404621 ](https://www.rhsboating.com.au/categories/nairn-6-inch-inspection-port-white-boat-hardware-boat-deck-cabin-hardware.html)

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   [ ![RWB4145](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Kit Bag - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-kit-bag-150mm-6-inches.html)

   $42.45  each    [ Nairn Inspection Port Kit Bag - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-kit-bag-150mm-6-inches.html)      [ RWB4145 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-kit-bag-150mm-6-inches.html)

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   [ ![RWB4140](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port O-Ring - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-100mm-4-inches.html)

   $4.18  each    [ Nairn Inspection Port O-Ring - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-100mm-4-inches.html)      [ RWB4140 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-100mm-4-inches.html)

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   [ ![RWB4141](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port O-Ring - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-125mm-5-inches.html)

   $4.69  each    [ Nairn Inspection Port O-Ring - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-125mm-5-inches.html)      [ RWB4141 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-125mm-5-inches.html)

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   [ ![RWB4142](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port O-Ring - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-150mm-6-inches.html)

   $6.13  each    [ Nairn Inspection Port O-Ring - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-150mm-6-inches.html)      [ RWB4142 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-o-ring-150mm-6-inches.html)

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   [ ![RWB4130](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - Black - 100mm (4 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-100mm-4-inches.html)

   $10.86  each    [ Nairn Inspection Port Replacement Lid - Black - 100mm (4 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-100mm-4-inches.html)      [ RWB4130 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-100mm-4-inches.html)

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   [ ![RWB4133](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - Black - 125mm (5 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-125mm-5-inches.html)

   $12.65  each    [ Nairn Inspection Port Replacement Lid - Black - 125mm (5 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-125mm-5-inches.html)      [ RWB4133 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-125mm-5-inches.html)

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   [ ![RWB4136](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/500x500/chatgpt_image_sep_24_2026_09_02_48_am.jpg "Nairn Inspection Port Replacement Lid - Black - 150mm (6 inches)") ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-150mm-6-inches.html)

   $15.04  each    [ Nairn Inspection Port Replacement Lid - Black - 150mm (6 inches) ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-150mm-6-inches.html)      [ RWB4136 ](https://www.rhsboating.com.au/categories/nairn-inspection-port-replacement-lid-black-150mm-6-inches.html)

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- [](https://www.rhsboating.com.au/brands-listing/category/ichiro-marine-engine-oils-lubricants/view-category/layout-listing.html?start=3927&limit=21)
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- [189](https://www.rhsboating.com.au/brands-listing/category/ichiro-marine-engine-oils-lubricants/view-category/layout-listing.html?start=3927&limit=21 "189")
- [190](https://www.rhsboating.com.au/brands-listing/category/ichiro-marine-engine-oils-lubricants/view-category/layout-listing.html?start=3927&limit=21 "190")
- [191](https://www.rhsboating.com.au/brands-listing/category/ichiro-marine-engine-oils-lubricants/view-category/layout-listing.html?start=3927&limit=21 "191")
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- [](https://www.rhsboating.com.au/brands-listing/category/ichiro-marine-engine-oils-lubricants/view-category/layout-listing.html?start=3927&limit=21)
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