Hello
Im just done with a repower and having problems with my trim pump,im quite far with my troubleshooting but need some help.I have custom built a ford 2.5 turbodiesel engine and mated it to a alpha one outdrive and shield.I would believe the outdrive, shield and trim pump are from the same original boat from 1990,last years before the alpha one gen 2.The trim pump looks like this one:
https://www.google.fi/search?q=merc...ICigB&biw=2144&bih=1066#imgrc=NMuEJE7Hd_yI1M:
The problem im having is that the trim works fine while on idle andf slows speeds,but while up on plane the outdrive wont go upp,but will go down.
When I put it all together I connected the gray hose(high pressure) from the shield to the trim pump connection thats says up,black hose the the connection thats says down.I connected the wiring as per mercruiser instructions.This resultted in inverted functions,when I pressed up button the outdrive went down.
To my knowledge the green wire is down,purple(tilt) and blue is up(trim).I measured the voltages and they were correct,when I pressed down the green wire was getting 12V at the pump.So I assumed somebody has switched the hoses at the shield.So that when I for instance press up and the blue wire powers the solenoid for the thick blue wire and THe pump pressurizes the up connectiong(gray hose) it actually pushes the outdrive down.
At this point I was a bit unsure what to do,taking the easy way out I switched the thick wires from the solenoids.So that the thin blue wire power the solenoid for the thick green wire.This is the current situation and resulted in the situation above,everything works except up on plane.The trim wont change when up on plane,its hold steady and I can ofcourse trim the outdrive down while up on plane,just not down.Is there differences in output pressures in the trim pump regarding up and down?
I was thinking about swithing the hydraulic hoses at the pump and also switch the wiring back to manufacturer specifications.Is there any differences in pressure ratings between the hoses?
Also a small other question.The boat has no feedback steering and no power steering.Its very heavy to steer to the right,easy to the left.This should be adjusted with the trim tab anode,however My zinc tab will only allow very slight adjustment,maybe 10 degrees eityher way.Do I have the wrong trim tab or what?Is there differences in outdrives so that powersteering ones dont allow for trim tab zing adjustments?I think this outdrive originally had a engine with power steering.
Im just done with a repower and having problems with my trim pump,im quite far with my troubleshooting but need some help.I have custom built a ford 2.5 turbodiesel engine and mated it to a alpha one outdrive and shield.I would believe the outdrive, shield and trim pump are from the same original boat from 1990,last years before the alpha one gen 2.The trim pump looks like this one:
https://www.google.fi/search?q=merc...ICigB&biw=2144&bih=1066#imgrc=NMuEJE7Hd_yI1M:
The problem im having is that the trim works fine while on idle andf slows speeds,but while up on plane the outdrive wont go upp,but will go down.
When I put it all together I connected the gray hose(high pressure) from the shield to the trim pump connection thats says up,black hose the the connection thats says down.I connected the wiring as per mercruiser instructions.This resultted in inverted functions,when I pressed up button the outdrive went down.
To my knowledge the green wire is down,purple(tilt) and blue is up(trim).I measured the voltages and they were correct,when I pressed down the green wire was getting 12V at the pump.So I assumed somebody has switched the hoses at the shield.So that when I for instance press up and the blue wire powers the solenoid for the thick blue wire and THe pump pressurizes the up connectiong(gray hose) it actually pushes the outdrive down.
At this point I was a bit unsure what to do,taking the easy way out I switched the thick wires from the solenoids.So that the thin blue wire power the solenoid for the thick green wire.This is the current situation and resulted in the situation above,everything works except up on plane.The trim wont change when up on plane,its hold steady and I can ofcourse trim the outdrive down while up on plane,just not down.Is there differences in output pressures in the trim pump regarding up and down?
I was thinking about swithing the hydraulic hoses at the pump and also switch the wiring back to manufacturer specifications.Is there any differences in pressure ratings between the hoses?
Also a small other question.The boat has no feedback steering and no power steering.Its very heavy to steer to the right,easy to the left.This should be adjusted with the trim tab anode,however My zinc tab will only allow very slight adjustment,maybe 10 degrees eityher way.Do I have the wrong trim tab or what?Is there differences in outdrives so that powersteering ones dont allow for trim tab zing adjustments?I think this outdrive originally had a engine with power steering.
.I believe the hoses have been switched at the shield.So the the pump high pressure gray line actually goes to the down side on the trim ram(this should be low pressure side),and the low pressure black hose goes to the up side on the trim ram(this should be high pressure).Due to this being wrong I tried to correct it by switching the wiring,I however suspect the trim pump supply different pressures to either side,and since the upside is supplied by the lp side of the pump,it doesnt have enough juice to lift the outdrive while on plane.I would like to remedy this by switching the hoses at the pump,switching them at the shield would require lifting the engine out which im not so keen on doing.If I switch the hoses I will also need to return wiring back to original.What im interested in is if theere is physical differences between the black and grey hose,they look identical except fro the colour.If I switch them at the pump the black line will be the high pressure up line and grey lp down line.