I have a mercruiser 12O sterndrive with a pre alpha outdirve. I think some water must have been trapped in the casting pocket and frozen last winter. at the beginning of this year I saw a small bubble with a crack on the lower unit. It eventually started leaking water and got worse. Can this...
I've posted here a few times in the past and have always gotten good advice. A big thank you to everyone that has helped me out before. My current problem is my 120 Mercruiser sterndrive keeps overheating. I had a reputable company put a new water pump in the lower unit - old one looked fine...
I have a 2.5L 120 hp 4 cyl mercruiser sterndrive. It starts, idles and launches great. However when running at WOT or High RPM's under heavy load the valves start making a strange noise and loosing some horse power. It can be best described as sounding like a marble spinning around in the...
Basically new - used 4 times Michigan Wheel Vortex 4 blade 15" diamater X 16" pitch prop part #992202. It has cupped blades - no nicks or flaws. Just too much pitch for my boat. Could replace a 3 - blade 15X18 prop. Great for water sports and designed for good hole shot. MSRP is $179 -...
I was just wondering what affect over reving an 1978 120 hp mercruiser sterndrive by 100-200 rpm over manufacturer reccomendation would have on performance and engine life? I simply want to get the best hole shot possible but don't want to kill the engine by over reving or loose performance by...
I have just moved to Hilton Head Island, Sc. My neighbor said that the cobia should start running soon. I was just wondering if anyone had any info on bait and/or technique for catching cobia out of inlet waterways. Also if anyone know when or at what water temp they get active would be good...
Posted before when deciding on a prop - now I have it but I am not turning as many rpm's as I would like to. I was running a 17p 3 blade at 4200 rpms at wot on my 120 merc. sterndrive. I purchased a vortex 4 blade 16p that is cupped. Now I am only hitting 3900 rpm's. Merc reccomends...
I have a 1978 mercruiser 120 sterndrive. I have been looking into cheap ways to improve my engine performance. I saw a complete head off a mercruiser 140 including rockers and valves but needs to be rebuilt. They say it will fit a 2.5 L or 3.0 L - could that be correct and would this fit on...
I am currently running a 3 blade 17 pitch non cupped prop and am hitting ideal rpms. Want to swithch to 4 blade for wakeboarding. I am looking at a vortex prop which is cupped. Does the cupping have any effect on rpm's or top speed? rule of thumb is that a 4 blade 16 pitch replaces a 3 blade...
is there any rule of thumb as to increasing weight to decrease rpm. I have a 19 foot cuddy cabin running a 120 Hp merc sterndrive. Any experience or input is greatly appriciated.
I had a bunch of work done on my merc sterndrive about 1 1/2 years ago at a reputable shop. included new bellows, u-joints, gimble bearing, exhaust manifod and riser. I am still seeing water in my gear oil. With new bellows I am not sure where this water is coming from. Anyone have any Ideas...
I just put a new exhaust manifold, riser and seals in my 120hp sterndrive mercruiser last year. Pretty pricey parts for my wallet. Since then I have flushed the motor and drained the block and manifold after each use. I was wondering if draining all the water out was neccessary and if I should...
I have a 1977 19' Steury cuddy cabin. It is a fiberglass hull and has a 120 Mercruiser I/o. It is in pretty good shape especially for the age. I have owned it for about 5 years and have done a good bit of work on it but mostly overdue maitenance. I know Stuery went out of business in the...
I've been reading all the threads but can't find a solution to my problem. Hope y'all can help. I have a 1977 19' Stuery Cuddy Cabin on the original tadam axel trailer. Problem is that when I winch it up the bow roller hits too far up on the bow. I have to put alot of power into the winch to...
One last question - I want to lubricate my U-Joints. Can I pull the drive unit without dropping my gear oil? Will the U-Joints come out with the drive unit or will I have to remove the bevel or the bell housing?
