How do I convert 40 HP Merc to 20 HP - whaaa?-> local lake rules

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overpower

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Sep 5, 2010
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Was just jawboning with my brother in law over a breski...ad wondered whether if the 40 can be converted to 20 - and we could show Smokey the Bear the repair bill and cert from the local shop that the motor was converted down to 20.

details: Have a 2003 40 HP Merc elec start, remote and a 9.9 kicker on a 16 ft boat. Runs great, but the local lake I fish on has 20 HP max...and the kicker really doesn't move the boat much (plus it's a pain to operate). Looked at selling the 2 engines and buying a 20 HP...but the cost of doing that was $2,500 ($4K for 20 HP, $500 work, rebate on the 40 and the 9.9 = $2K).

There are few other good lakes around, so I really don't mind permanent mod to 20...but it would be great if I could just chuck parts (smaller carb?) in my basement and retro back to 40 when I sold it...or perhaps moved to somewhere that the 40 would make sense.

Thanks for any advice.
 

tx1961whaler

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Re: How do I convert 40 HP Merc to 20 HP - whaaa?-> local lake rules

If I had the room, I might just pick up a small tinny and run the 9.9 on it.
 

cookbayou

Seaman
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Apr 20, 2009
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Re: How do I convert 40 HP Merc to 20 HP - whaaa?-> local lake rules

Just put 20hp stickers on the callon:
 

JB

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Re: How do I convert 40 HP Merc to 20 HP - whaaa?-> local lake rules

Get a used 20.
This is a duplicate to your Merc Forum post. Not good.
 
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