Tired motor ?
06-17-2008 | 08:38 AM
#11
VIP Member
Joined: Dec 2006
Posts: 641
Likes: 1
From: price, utah
last year I had to tune turn the idle up because it would barely run at 650 rpms. Then it would not shift out of drive being that I had it to high, I turned it down. Now it has a harder time starting at such a low RPM. This motor is a 1986 in a older 23 Powerplay. I am thinking that the motor may be getting tired... or really just the cam ? it does not burn any oil and a few years back it had some oil pressure issues and I thougth it might be the gauge and got it back to the marina and it was the oil filter. That was 2002 ?
any ideas ?
Thanks,
Steve
any ideas ?
Thanks,
Steve
thats my 2 cents
Larrry
06-17-2008 | 09:00 AM
#12
Registered User
Joined: Oct 2003
Posts: 9,495
Likes: 6
Compression test gives you a quick snapshot of whether it's a cylinder or top-end wear issue. Leakdown is a better diagnostic tool for determining where the problem lies. I always put a dial indiicator on the rockers to see if I have cam wear- it's not uncommon at all to see worn lobes on these engines.
I would not suggest a big block on an Alpha. Merc tried it and smoked alot of drives. Much over 300 horse is going to shorten the life of a fresh one. If yours hasn't been open in a while, it's safe to assume the clearances are widened- adding power is the last thing it needs.
I would not suggest a big block on an Alpha. Merc tried it and smoked alot of drives. Much over 300 horse is going to shorten the life of a fresh one. If yours hasn't been open in a while, it's safe to assume the clearances are widened- adding power is the last thing it needs.
