Replacement marine engine for 8.1 Horizon Mercruiser, now that seawater entered


Thanks for your inquiry and the opportunity at earning your business. As indicated in the product title this is a longblock not a complete drop in motor. I’ve atatched several links which should be helpful for you as you start your investigation. Please note that the 8.1L engine was dropped last year so there really are not any NEW complete motor options any longer, just the bobtail. Using the link below you can add your selected product(s) to your shopping cart and the shipping estimator located at the bottom of the shopping cart page will give you a shipping cost based on your specific postal code. Let me know if you need any further technical information or help placing your order. In either case I will be glad to assist!

Link to Terminology Help

Link to New 8.1L Longblock

Link to Drop In Motor Options


Performance Product Technologies/IShopBoating
8002 West 6th Street
Stillwater, OK 74074
(405) 533-3812
Fax (775) 257-1769

Patrick writes:
I need a replacement engine, i have a 8.1 horizon now that seawater entered. Is this for a complete drop in engine, is it a mercruiser? WIll i need parts from my other engine?
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One Response to “Replacement marine engine for 8.1 Horizon Mercruiser, now that seawater entered”

  1. dwight says:

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