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#1
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also noticed in the parts breakdown there are 2 different impellors & housing. you said impellor looks new, po might have tried to solve overheat issue with new impellor and got wrong size.
these are the prices i'm finding 89981 impellor 12.91 89980 impellor 20.34 70941a housing 59.19 92970a housing 31.35 these were on boats.net Last edited by phatdaddy; 07-28-2015 at 04:29 PM. 
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#2
07-29-2015, 04:20 PM
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Phat, looks like you win the overheat derby. I used my micrometer on the driveshaft and then my veneer calipers on the ID of the old Impeller. there's almost .020 slop. Seems Mercury used 2 different driveshafts on these engines and as you correctly called it that results in 2 different impellers and housings.
The PO obviously installed the wrong one. It's just enough that the pumping action just isn't there.There shouldn't be any slop between the shaft & impeller. There are two impellers that can fit that outboard. The 47-89981 has a .456 ID the 47-89980 has a .438 ID. The .456 is what I have, the .438 is what should be there.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#4
07-30-2015, 09:03 AM
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Something to keep in mind too is the different sized water tubes with the kits for different length shafts. The short one will always fit.
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1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#5
08-02-2015, 06:54 PM
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So, just curious, did you make the change yet? Was that the problem?
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#6
08-02-2015, 08:24 PM
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These guys are amazing
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love to fish
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