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Author Topic: 1988 Osprey 170 Fuel Tank Replacement  (Read 413 times)

April 11, 2023, 02:02:25 PM
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UVAcavsLewis

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1988 Osprey 170 Fuel Tank Replacement
« on: April 11, 2023, 02:02:25 PM »
Hi All,

I plan to replace the OEM fuel tank on my 1988 Osprey 170 in a few weeks.

I called up Phil yesterday at Alloy Metal Works and he is working on the tank fab...4 week lead time.

Before I go on this adventure, any tips or insight that can be shared to make this a successful rebuild?

Any comments would be greatly appreciated!

Thanks again,
Nic
1988 Osprey 170 "Apex Predator"

April 11, 2023, 04:25:28 PM
Reply #1

RickK

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #1 on: April 11, 2023, 04:25:28 PM »
You might want to change the fill hose to the hull side gunwale top. It's a slightly difficult job and we have a lot of examples of doing this.  Change the vent hose same time.  Also you should change the hose from the tank to the engine. All this will be apparent as you get into this.  You might want to pull the tank and start on the hoses now though, while you're waiting for the tank.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

April 15, 2023, 10:35:45 AM
Reply #2

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #2 on: April 15, 2023, 10:35:45 AM »
Thanks Rick, hoping to get started today to get an understanding of the condition.

Any suggestions or tips on how to secure the new tank?
1988 Osprey 170 "Apex Predator"

April 16, 2023, 05:08:59 AM
Reply #3

RickK

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #3 on: April 16, 2023, 05:08:59 AM »
I would see how the old one was secured and see if you can copy that, minus any rubber or anything that can trap water against the tank.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

April 17, 2023, 11:26:08 AM
Reply #4

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #4 on: April 17, 2023, 11:26:08 AM »
Thanks Rick, I opened it up yesterday, see the pictures below, do you know what the smaller clear line is that is going parallel to the larger fill hose?











1988 Osprey 170 "Apex Predator"

April 17, 2023, 04:21:54 PM
Reply #5

RickK

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #5 on: April 17, 2023, 04:21:54 PM »
 :think:
Maybe run that by Phil, pics too, and see if he's seen that or even made it like that.
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

April 18, 2023, 02:36:05 PM
Reply #6

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #6 on: April 18, 2023, 02:36:05 PM »
Thanks Rick, will do!
1988 Osprey 170 "Apex Predator"

April 19, 2023, 02:31:20 PM
Reply #7

Capt. Bob

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #7 on: April 19, 2023, 02:31:20 PM »
After passing through the coffin/bulkhead, where does the other end go? :ScrChin:
Can you find it?

That's definitely "former owner" installed. Can't recall ever seeing that on this Forum.
]
Capt. Bob
1991 210 Walkaround
2018 Yamaha 150 4 Stroke
"Reef or Madness IV"

April 19, 2023, 04:41:53 PM
Reply #8

RickK

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #8 on: April 19, 2023, 04:41:53 PM »
Maybe it went to a gas trolling motor?
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

May 09, 2023, 11:10:24 AM
Reply #9

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #9 on: May 09, 2023, 11:10:24 AM »
After passing through the coffin/bulkhead, where does the other end go? :ScrChin:
Can you find it?

That's definitely "former owner" installed. Can't recall ever seeing that on this Forum.

The other end terminated at the fill hose connection on the gunwale.
1988 Osprey 170 "Apex Predator"

May 09, 2023, 11:14:16 AM
Reply #10

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #10 on: May 09, 2023, 11:14:16 AM »
I have successfully removed the old fuel tank and the new tank is in place, engine cranked up and everything seems to be in good order.

One issue was found, my fuel gauge is not working (sits on empty)...my hunch is I need a new gauge, does anyone know the ohmage required for a new gauge? 0-90 ohms? 30-240?

Thanks,
1988 Osprey 170 "Apex Predator"

May 09, 2023, 12:23:14 PM
Reply #11

Capt. Bob

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #11 on: May 09, 2023, 12:23:14 PM »
One issue was found, my fuel gauge is not working (sits on empty)...my hunch is I need a new gauge, does anyone know the ohmage required for a new gauge? 0-90 ohms? 30-240?

OK,
First, is it safe to assume you installed a new sensor in the new tank? Industry standard is 30-240 ohms. If not, that is more than likely your problem.
Second, if you have then a new gauge is needed and they work on that 30-240 ohm standard (here in the USA anyway).

]
Capt. Bob
1991 210 Walkaround
2018 Yamaha 150 4 Stroke
"Reef or Madness IV"

May 10, 2023, 06:20:28 PM
Reply #12

Riverrunner23

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #12 on: May 10, 2023, 06:20:28 PM »
I was wondering if anyone has installed a Moeller permanent plastic tank under the console like they did in the early 1970’s 170. Where does the battery go? Any input is appreciated! Thanks

May 15, 2023, 09:56:31 AM
Reply #13

UVAcavsLewis

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #13 on: May 15, 2023, 09:56:31 AM »
One issue was found, my fuel gauge is not working (sits on empty)...my hunch is I need a new gauge, does anyone know the ohmage required for a new gauge? 0-90 ohms? 30-240?

OK,
First, is it safe to assume you installed a new sensor in the new tank? Industry standard is 30-240 ohms. If not, that is more than likely your problem.
Second, if you have then a new gauge is needed and they work on that 30-240 ohm standard (here in the USA anyway).



I replaced the fuel gauge, and wiring and all is good, 30-240 was correct thanks!
1988 Osprey 170 "Apex Predator"

May 16, 2023, 05:03:18 PM
Reply #14

RickK

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Re: 1988 Osprey 170 Fuel Tank Replacement
« Reply #14 on: May 16, 2023, 05:03:18 PM »
:old01: Capt. Bob is DA MAN and has been for many years
Rick
1971 "170" with 115 Johnson (It's usable but not 100% finished)

1992 230 Explorer with 250 Yamaha

 

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