Bought a new rig last weekend with a 97 60hp Mariner 2stroke, noticed the prop spinning while in neutral while I was running it up, at a guess I'd say it was doing about 150-180rpm in reverse. Felt for any movement or grinding when I stopped it but was all ok.
Anyway got it home and did a gearbox oil change and took the prop off, cleaned shaft and relubed, ran it up again and it probably halved the spin speed. Took it for a sea test and all was ok (although I completely forgot to check if it was spinning whilst in water).
Im just wondering if there's anything I should be concerned about? My old 30 didnt spin nor did a mates 96 90hp Merc. I've read conflicting thins about it so thought I'd try here too
Cheers
aj.2.,
Nov 4, 7:41pm
just that every thing is new , the shaft is turning , but is pushing the oil around, so is causing a flow, and the prop is turning backwards because of it. But if you start it , and hold the prop with a piece of wood , it will not try to turn . You would have not have felt it trying to push , at the sea test , as it is not being Gear driven , at that stage.
heywillhay1,
Nov 4, 8:25pm
Thanks Aj, yeah when it was running I was able to stop the prop with my boot and I couldn't feel any resistance to this so I assumed it was all ok. Just that it was spinning so quick worried me, I thought it may be going backward in the water!
m16d,
Nov 5, 5:25am
Thats a Mariner for you. I followed one on a trailer once and the prop was spinning about a million revs in the wind.
bwg11,
Nov 5, 6:19am
Both my motors spin the prop slowly (about 100 rpm) when flushing with muffs. Mercury and Yamaha.
klrider,
Nov 5, 6:34am
You have to be very very careful, my previous 90 hp Yamaha was spinning in a similar fashion, it took off and flew into the next neighbourhood, lucky it didnt hurt anyone.
heywillhay1,
Nov 5, 10:41am
Thanks Guys, Doesn't sound too harmful then, bit of a follow up question, will it cause damage to put it in gear when flushing the outboard on the driveway?
bwg11,
Nov 5, 2:43pm
No, that is provided the prop doesn't catch on the hose !
snork28,
Nov 5, 5:02pm
my 50 hp merc has done that since ive owned it about 6 years, i just put a piece of wood under it when flushing to stop prop turning,the prop wont turn when in the water theres to much resistance.
Wow the gearbox is quite simple!, thanks for sharing Gamefisher, nice point about prop freewheeling on the trailer. I can say I've ever put it in gear but then again I have a flag around the prop when on the trailer
mainlander05,
Nov 11, 7:15pm
Sometimes its best to keep mouth shut when talking BS as it dribbles down your chin. You must be the idiot of the day in here. Normally I wouldn't even bother with dipsticks like you but seriously?
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