The Tuul Crib 7,336 #1 Posted November 15, 2020 I'm going through the mower decks that I have and I have these two pics. First one I am not sure of model or serial number. The other is off my charger that I'm about to go through. I really need a side discharge right now and don't have one! all I have is the rear discharge on my 414-8. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,033 #2 Posted November 15, 2020 I do not know what you have but here is a list of the 42" SD decks in the order they were produced Mower DNA 1966-1967 model RL-426 replaced by 1968 model 5-1421 1969 model 5-1422 1970 model 5-1423 1971 model 5-1000 1971-1972 model 5-1001 1973-1974 model 5-1010 1975 model 5-1011 1975 model 5-1012 1976 model 65-42MS01 1976 model 65-42MS02 1977 model 75-42MS01 - These 42" side discharge decks all use blades with 5/8" x 3/4" double-D center hole unless the spindles have been upgraded (Do not have operator manual) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- These decks all use blades with a 3/4" center hole. 1977 model 75-42MS02 replaced by (Do not have operator manual) 1978 model 85-42MS01 (Do not have operator manual) 1979 model 95-42MS00 (Do not have operator manual) 1979 model 95-42MS01 (Do not have operator manual) 1980 model 05-42MS01 (Have operator manual) 1981-1983 model 05-42MS02 1984 model 05-42MS03 - Last year for bearings with 3/4" ID 1985 model 05-42MS04 - First year for bearings with 17mm ID unless older spindles were updated. 1986-1988 model 05-42MS05 1989 model 15-42SC01 1990 model 15-42SC02 1990-1992 model 15-42SC03 1993-2007 and 2009-2012 model 78345 - These decks all use blades with a 3/4" center hole. Note - 17mm is .669" The spindle ID charts may help as long as they are original to the deck Share this post Link to post Share on other sites
The Tuul Crib 7,336 #3 Posted November 15, 2020 1 hour ago, gwest_ca said: I do not know what you have but here is a list of the 42" SD decks in the order they were produced Mower DNA 1966-1967 model RL-426 replaced by 1968 model 5-1421 1969 model 5-1422 1970 model 5-1423 1971 model 5-1000 1971-1972 model 5-1001 1973-1974 model 5-1010 1975 model 5-1011 1975 model 5-1012 1976 model 65-42MS01 1976 model 65-42MS02 1977 model 75-42MS01 - These 42" side discharge decks all use blades with 5/8" x 3/4" double-D center hole unless the spindles have been upgraded (Do not have operator manual) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- These decks all use blades with a 3/4" center hole. 1977 model 75-42MS02 replaced by (Do not have operator manual) 1978 model 85-42MS01 (Do not have operator manual) 1979 model 95-42MS00 (Do not have operator manual) 1979 model 95-42MS01 (Do not have operator manual) 1980 model 05-42MS01 (Have operator manual) 1981-1983 model 05-42MS02 1984 model 05-42MS03 - Last year for bearings with 3/4" ID 1985 model 05-42MS04 - First year for bearings with 17mm ID unless older spindles were updated. 1986-1988 model 05-42MS05 1989 model 15-42SC01 1990 model 15-42SC02 1990-1992 model 15-42SC03 1993-2007 and 2009-2012 model 78345 - These decks all use blades with a 3/4" center hole. Note - 17mm is .669" The spindle ID charts may help as long as they are original to the deck This is a good start Gary ! Thanx! Share this post Link to post Share on other sites
Goldnboy 910 #4 Posted November 15, 2020 I can't give you a definite answer but I am sure they are both pre-1973 since neither have front gauge wheels. Normally the pre 73 decks have 1 front gauge wheel in the center. However there is the possibility someone decided to remove them..... Share this post Link to post Share on other sites
