Engine dropping rpm forward / reverse
07-19-2023 | 05:30 PM
#1
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
Engine dropping rpm forward / reverse
On the trailer noticed rpm drops while shifting in gear. SM3 drives with bam 1350 trans. Drained outdrive fluid and looked good and drain plug magnet minimal shavings. (Normal).
neutral prop shaft spins like it’s sister. 😂
Other side rpm doesn’t change (on trailer)
neutral prop shaft spins like it’s sister. 😂
Other side rpm doesn’t change (on trailer)
07-21-2023 | 07:35 AM
#3
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Joined: Jan 2005
Posts: 1,156
Likes: 518
From: Owen Sound Ont.
Probably going to need more details, what ignition does it have (timing advance when the rpm drops below a certain RPM), how much does it drop, enough to stall it out, does the sister drop at all? Stuff like that. Is it new to you? It will take some hp to pump the transmission and spin the drive, how much I have no clue.
