Over Cranking Damage?
Moderators: BeaconMarineBob, Moderator, BeaconMarineDon
Over Cranking Damage?
I'm getting ready to try to start my 6.5 Onan genset. It hasn't been running in 3 years. I've read stories about how some owners have trashed their gensets by "over-cranking" them which seemed to cause raw water to enter the engine via the exhaust valves? Anyone familiar with the details and prevention of this?
1970 36' Trojan Tri-Cabin Enc. Pilot House
aka "Basket Case"
383 Chryslers 280 HP V-Drives
Lincoln Harbor Yacht club
Weehawken, NJ
"If you continue on the course you are on, you run the risk of winding up where you are heading"
aka "Basket Case"
383 Chryslers 280 HP V-Drives
Lincoln Harbor Yacht club
Weehawken, NJ
"If you continue on the course you are on, you run the risk of winding up where you are heading"
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prowlersfish
- 2025 Gold Support
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- Joined: Sat Nov 05, 2005 6:56 pm
- Location: Lower Chesapeake Bay ,Va
If you have a water lift muffler ( and most likely you do) there is a danger . Keep the water valve closed will help but open it as soon as it starts , yes its not the best thing for the impeller but thats better then sucking water through the engine .
Boating is good for the soul
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
77/78 TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat
I agree with Paul, shut the raw water intake off first. As for the impeller, I wouldn't worry too much about it because it's been sitting for 3 years so you REPLACED it first, and when you did, you added the impeller grease that came with the Onan kit, right??!!! That should keep it from turning to powder until you get the unit running.
She was a 1969 36 ft wooden beauty with big blue 440s that we'll miss forever.
And thanks to the gang, 2012 Trojan Boater Of The Year
And thanks to the gang, 2012 Trojan Boater Of The Year
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alexander38
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you can hurt it by over cranking it, when I was messing with mine (po hadn't ran it in 8 yrs.) I filled the intake hose with ky jelly ( insert jokes here ) but it works ! and it kept the impeller from getting eatin' 
Carver 3607 ACMY 454's Merc's
10' Dinghy 6hp Merc.
La Dolce Vita
Let's hit the water !
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10' Dinghy 6hp Merc.
La Dolce Vita
Let's hit the water !
http://s852.beta.photobucket.com/user/t ... 8/library/
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RWS
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================================alexander38 wrote:you can hurt it by over cranking it, when I was messing with mine (po hadn't ran it in 8 yrs.) I filled the intake hose with ky jelly ( insert jokes here ) but it works ! and it kept the impeller from getting eatin'
Most of us keep a tube or two of the KY on the boat, but if you are one of those who don't just squirt a bottle of DAWN liquid dish detergent into the strainer.
RWS
1983 10 Meter SOLD after 21 years of adventures
Yanmar diesels
Solid Glass Hull
Woodless Stringers
Full Hull Liner
Survived Andrew Cat 5,Eye of Charley Cat 4, & Irma Cat 2
Trojan International Website: http://trojanboat.com/
WEBSITE & SITELOCK TOTALLY SELF FUNDED
Yanmar diesels
Solid Glass Hull
Woodless Stringers
Full Hull Liner
Survived Andrew Cat 5,Eye of Charley Cat 4, & Irma Cat 2
Trojan International Website: http://trojanboat.com/
WEBSITE & SITELOCK TOTALLY SELF FUNDED
All good suggestions guys. Thanks. Yep, will be changing and lubing the impeller before I go near the starter switch.
1970 36' Trojan Tri-Cabin Enc. Pilot House
aka "Basket Case"
383 Chryslers 280 HP V-Drives
Lincoln Harbor Yacht club
Weehawken, NJ
"If you continue on the course you are on, you run the risk of winding up where you are heading"
aka "Basket Case"
383 Chryslers 280 HP V-Drives
Lincoln Harbor Yacht club
Weehawken, NJ
"If you continue on the course you are on, you run the risk of winding up where you are heading"