swihartart
Petty Officer 3rd Class
- Joined
- May 4, 2009
- Messages
- 82
Hello all,
The Question: What is involved with upgrading from Prestolite to Oildyne with Alum. Reservoir?
Why I ask:
I've had nothing but trouble with the Prestolite trim system on my 3.0 140 HP Merc. Kept me off the water most of the year last year. Tried new pump, hoses, trim cylinders and dist. block...still intermittent trim operation especially the "up" side. Pump strains and doesn't want to lift sometimes even after bleeding the system over and over. I'm using ATF for fluid as I've read it doesn't matter even though the sticker says 10w - 30.
The guy I bought the pump and cylinders from on Ebay (Merc. Mike from Tennesee) says the reverse lock out is to blame and will never be a reliable system even if I try a rebuilt RLO valve. He recommends I upgrade to Oildyne pump with alum. res. because it has RLO built in and is a much better system. He says I can use the same older style trim cylinders I have with the hose connections on the front side to dist. block and replace the internal hoses (black and grey). The manual warns that you cannot do this.
Manual 6 section 5B says:
Due to differences in internal valving, the Oildyne
trim pump cannot be used to replace an earlier
high pressure Prestolite pump, or vice-versa.
Use of incorrect pump will affect trim operation
and may cause damage to trim system.
Question: Should I buy a Oildyne Alum. Res. pump ($350) and take his word for it and hopefully solve this problem or am I just asking for more issues with cylinder / pump incompatability?
Thanks in advance for your info.
Sean
The Question: What is involved with upgrading from Prestolite to Oildyne with Alum. Reservoir?
Why I ask:
I've had nothing but trouble with the Prestolite trim system on my 3.0 140 HP Merc. Kept me off the water most of the year last year. Tried new pump, hoses, trim cylinders and dist. block...still intermittent trim operation especially the "up" side. Pump strains and doesn't want to lift sometimes even after bleeding the system over and over. I'm using ATF for fluid as I've read it doesn't matter even though the sticker says 10w - 30.
The guy I bought the pump and cylinders from on Ebay (Merc. Mike from Tennesee) says the reverse lock out is to blame and will never be a reliable system even if I try a rebuilt RLO valve. He recommends I upgrade to Oildyne pump with alum. res. because it has RLO built in and is a much better system. He says I can use the same older style trim cylinders I have with the hose connections on the front side to dist. block and replace the internal hoses (black and grey). The manual warns that you cannot do this.
Manual 6 section 5B says:
Due to differences in internal valving, the Oildyne
trim pump cannot be used to replace an earlier
high pressure Prestolite pump, or vice-versa.
Use of incorrect pump will affect trim operation
and may cause damage to trim system.
Question: Should I buy a Oildyne Alum. Res. pump ($350) and take his word for it and hopefully solve this problem or am I just asking for more issues with cylinder / pump incompatability?
Thanks in advance for your info.
Sean