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05-06-2016, 12:48 AM #1Member
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How to speed up single ram offshore trim
I cant find the thread but I read something about "mercruiser mod" to the pump. not to be confused with swapping out the pump to a mercruiser pump.
What are my options making mine faster? 280 Offshore 20' mid with single ram trim.
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05-06-2016, 02:43 AM #2
First check which pump you have.
If it's the canister style bottom they are slow no matter what unless on 24v
there are a few different reservoir pumps. Don't remeber which part numbers which but there are some that are slower.
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05-06-2016, 06:01 AM #3
This Mercruiser mod you speak of,I beleve is replacing the pump plate with a MC gear set.Witch is the same as replacing the whole pump.You would need a doner pump,for the gear set.There is only one way to speed up your trim,more oil! Witch means ether a larger pump,or making your pump work harder/faster with 24V.I converted an OMC cobra stern drive pump $50 eBay and cut my lift time by almost forty percent.
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05-06-2016, 10:13 AM #45000 RPM
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I found a old junk boat with mercruiser and got the pump from it, remove tank and loosen set screw nut turn all the way in and back off 1/4 turn and set nut way faster than my old pump and it was rigged 24v but new one I just left it 12v. Works great
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05-07-2016, 01:29 AM #5
Yep. The Mercruiser pump is faster, and it is an easy swap.
Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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05-07-2016, 05:50 AM #6Screaming And Flying!
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Do you guys have any pictures and a part # for the "different"
pump that can be used?
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05-07-2016, 09:21 AM #7
going from engine oil to ATF makes them faster too.. lighter oil pumps faster
4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she
things that were are no longer as they are today...
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05-07-2016, 10:22 AM #8
Don't know how fast you want it to be but a member on here...CHAZ, just did one for a drag boat. You might be able to ask him.
http://s260.photobucket.com/user/vne...z6z0z.mp4.htmlI CAN ALWAYS MAKE ANOTHER DOLLAR, BUT I CANNOT MAKE ANOTHER DAY
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05-07-2016, 08:00 PM #9
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05-07-2016, 11:34 PM #10
My bobs pump is fast on 12 and stupid fast on 24v
i also run aeroshell aviation hydraulic oil.
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05-08-2016, 04:32 PM #11
ATF is the recommended oil. Also AW22 will work fine. You can get AW22 at NAPA.
There are 3 different ci. pumps available. Motors can be run 12V or 24V.
Go to the link I posted http://www.parker.com/literature/Oil...er%20units.pdf it will give all the information needed to make a system needed for the flow you want.
Have used this pump for many years working on hydraulic lifts.
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05-08-2016, 08:19 PM #12Screaming And Flying!
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05-09-2016, 05:48 AM #13
The amp draw will be less with a light oil also. The light oil will let the motor run at the RPM it was designed for. Heavy oil drags the motor down under load.
Ambient temp has a lot to do with how the system will work. This system dose not build heat from constant load so a light oil is all that is needed.
Heavy oil is needed on a constant load system to keep the viscosity when the system heats up.
The new ultra light synthetic eng oils will also work good.
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05-10-2016, 12:52 AM #14
Dittos what 90 5.0 said. We fried the old merc canister pump and replaced it with a Bobs pump. We have 24v up trim and 12 v down. Works great. Fittings from Bobs do NOT work. Must source from hydraulic shop.
1990 Shadow bass boat w/ 2.4 200 Merc. Totally resto'd boat and love it!
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