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1985 Grand Sport 3400 losing power on starboard engine .
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Topic author - Posts: 10
- Joined: Wed Jul 29, 2020 9:06 am
- Vessel Info: 1985 Grand Sport 3400
- Been thanked: 3 times
1985 Grand Sport 3400 losing power on starboard engine .
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- Posts: 137
- Joined: Thu Sep 05, 2019 11:30 am
- Vessel Info: 2003 270 Coastal
Twin 225 Yamaha
Location: Darien, Ga. - Has thanked: 9 times
- Been thanked: 24 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
You are correct on replacing the battery but once cranked the alternator should supply voltage.
Have you done plugs on these motors and if so what did they look like?
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- Posts: 167
- Joined: Fri Jun 23, 2017 9:46 pm
- Vessel Info: 87 st.tropez
- Location: Boston
- Has thanked: 7 times
- Been thanked: 52 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
The trim tabs are curious. They could be just creating more drag when fully down.
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- Posts: 766
- Joined: Fri Sep 07, 2018 6:37 am
- Vessel Info: Jester Toy
2002 270 Coastal, Twin Yamaha 4 stroke 250
330Larson Cabrio twin 5.7l EFI V.P duo props
2760 Regal commodore
40' pacemaker flush deck
2855 Bayliner, 25' Marathon aft cabin - Location: Hudson Fl
- Has thanked: 38 times
- Been thanked: 132 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
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Topic author - Posts: 10
- Joined: Wed Jul 29, 2020 9:06 am
- Vessel Info: 1985 Grand Sport 3400
- Been thanked: 3 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
-
- Posts: 137
- Joined: Thu Sep 05, 2019 11:30 am
- Vessel Info: 2003 270 Coastal
Twin 225 Yamaha
Location: Darien, Ga. - Has thanked: 9 times
- Been thanked: 24 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
-
Topic author - Posts: 10
- Joined: Wed Jul 29, 2020 9:06 am
- Vessel Info: 1985 Grand Sport 3400
- Been thanked: 3 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
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Topic author - Posts: 10
- Joined: Wed Jul 29, 2020 9:06 am
- Vessel Info: 1985 Grand Sport 3400
- Been thanked: 3 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
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- Posts: 226
- Joined: Sun Aug 10, 2014 9:15 pm
- Vessel Info: 1999 2600 Mart. 5.7 bravo3
- Location: Wauseon Oh,
- Has thanked: 25 times
- Been thanked: 35 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
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- Posts: 4
- Joined: Wed Sep 09, 2020 12:43 pm
- Vessel Info: 1985 Wellcraft 3400 Gran Sport
- Has thanked: 3 times
- Been thanked: 3 times
Re: 1985 Grand Sport 3400 losing power on starboard engine .
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