Question for FlyBoyMark

xpress829

Cadet
Joined
Apr 18, 2004
Messages
10
A month or so ago you wrote in a post that you installed 50hp carbs. on your 3 cyl 40hp Mercury and the change worked. I have a quetion about the reed stops that you said you removed. Does the motor have 50hp reed stops or something like retainers? The reason I ask is I am ready to do the same conversion and a mechanic told me all motors have reed stops to keep them from bending to far.
 

FlyBoyMark

Ensign
Joined
Apr 14, 2002
Messages
934
Re: Question for FlyBoyMark

There is a slightly larger retainer thats sorta like a big fender washer that ALSO has a lock tab on it as I recall that keeps the bolt from spinning out. THERE ARE NO REED STOPS on the 50 HP or the 60 Hp for that matter. The entire reed block assembly is the same on all three motors. If you do this conversion, make sure you use Boysen reeds, it really helps(150-200 more RPM, better hole shot and smoother idle). In additon you need to change the oil injection pump too. THIS IS MOST IMPORTANT!!! 50-60 HP oil pump are the same but different from the 40 HP. If you do not do this, your engine will eventually be damaged from to little oil. The plastic tee replaces a smaller one for the 40 HP thats rite by the oil pump. Everything else is the same.<br />Parts list you need to purchase:<br />WME-68-1 Top Carb #3301-824902T16 $120.15<br />WME-68-2 Center Carb #3301-824902T17 $113.81<br />WME-68-3 Bottom Carb #3301-824902T18 $124.79<br />50-60 HP Oil Pump #81802A-1 $103.19<br />Tee Connector #22-818993 $1.53<br />Total $463.47<br /><br />I bought parts for 20% off list@ $370.78<br /><br />Almost forgot:<br />Lock tab washer for reed bolt #14-429821 (3ea.) $1.40 ea.<br />Reed retainer #812879002 (3ea.) $?.??(I think about 1.60 ea.)<br />Gasket #27-812868 $5.90<br />Gasket #27-812869 $5.90<br /><br /><br />Once installed, oil pump needs to be calibrated and carbs syncronized and if you use Boysen Reeds, a little bit of finish work needs to done to the reed block(600 grit block sanding). All tune up spec is identicle to 40 HP. You may also have to increase your prop pitch 1 to 3 inches depending on your boat. :cool:
 

FlyBoyMark

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Joined
Apr 14, 2002
Messages
934
Re: Question for FlyBoyMark

It also dawned on me that if you fashioned a little aluminum plate to block off the oil pump mount you could remove the oil injection crap and save yourself the cost of the new oil pump and plastic tee plus the mechanics wages for calibrating the oil pump....and jus' run premix?!?!?... :cool:
 

xpress829

Cadet
Joined
Apr 18, 2004
Messages
10
Re: Question for FlyBoyMark

MY motor is a 40ml, which is not oil injected so I don't have to worry about that. Thanks for the parts numbers and all your help on this conversion.
 

FlyBoyMark

Ensign
Joined
Apr 14, 2002
Messages
934
Re: Question for FlyBoyMark

The manual carbs are different..will repost carb no.s for ya in a bit..
 
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