HP500 Valve springs checked ok, engine builder did not replace?
01-09-2005, 06:57 PM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
get new while the heads are apart would be foolish not to spend the few bucks now and now be down for a month in the middle of the season with a dropped valve. just my .02
01-10-2005, 08:15 PM
#13
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Re: HP500 Valve springs checked ok, engine builder did not replace?
Originally Posted by AIRTIME
HEY should I change mine ? THIS IS MY 2ND SEASON not running my boat, operations on my knees , no money no boating 
if you haven't been running it, you should be fine... how many hours do you have on them?
01-10-2005, 10:41 PM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
about 25to 30 hours should I pull the distribulor out and prime the motor so oil gets around when I changed the oil that fall I put syn,15 50 mobil and fogged it out? could I get away with turning it over slow to lube it or prime it 
01-10-2005, 10:50 PM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
Originally Posted by caveman
Valve springs and lifters are not the area to come up short on.
Drop off a set of PSI springs and some isky lifters. He will get the message.
Gerry
Drop off a set of PSI springs and some isky lifters. He will get the message.
Gerry
Last edited by mr_velocity; 01-10-2005 at 10:58 PM.
01-11-2005, 04:23 AM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
Airtime- I see no problem in turning it over on the starter until you get oil pressure. Some folks with a long layup back off all the rocker arms to relieve pressure on the valve springs. An easier way is to just spin the motor to a different position. Cranking to get oil pressure will accomplish both. Also a good time to charge the batteries.
01-11-2005, 06:43 AM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
If you don't mind i would like to know why so many of you guys are using a comp spring versus matching cam company spring.is it for quality or money?
I notice lost of thread were the comp spring# 929 are used on some cam that do not require such a heavy spring.i.e comp told me that for there XM284HR a 930 was fine.same with crane and there 731 they said #99896 which seem to be a softer sring.just trying to learn from the field,....thank's!
I notice lost of thread were the comp spring# 929 are used on some cam that do not require such a heavy spring.i.e comp told me that for there XM284HR a 930 was fine.same with crane and there 731 they said #99896 which seem to be a softer sring.just trying to learn from the field,....thank's!
01-11-2005, 06:20 PM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
When should the valve springs be replaced on 500EFI. I am hearing mixed opinions between 150hrs to 400hrs.whats the deal?
Mark
Mark
01-11-2005, 09:58 PM
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Re: HP500 Valve springs checked ok, engine builder did not replace?
On 500efi I called Merc racing myself and they said to replace them around 250 hours if youu runit very easy. I replaced mine at 270hrs and one inner spring was already broken, my mechanic didn't even see it until he pulled it out, motor ran perfect with it??? but was just a nightmare waiting to happen, thank goodness I caught it intime.
Thus tell this mech to get his head on straight and replace the springs
WILL
Thus tell this mech to get his head on straight and replace the springs
WILL
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