92 25 hp Rude Video Added

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
spitting out exhaust, carbs clean, compression 120 both, great spark. it is like it is double firing on bottom cylinder.
 

Cofe

Lieutenant Commander
Joined
Apr 23, 2009
Messages
1,883
Re: 92 25 hp Rude Video Added

Hey, I liked the video, but was LOUD.... It sounded like my 25 Rude with a blown head gasket. It would backfire just like in your video. Hope this helps ya.
 

Mas

Lieutenant Commander
Joined
Oct 3, 2006
Messages
1,656
Re: 92 25 hp Rude Video Added

Put a timing light on the wires and see if it fires twice.

MAS
 

Lone Duck

Master Chief Petty Officer
Joined
Oct 17, 2007
Messages
868
Re: 92 25 hp Rude Video Added

sounds like both cyl are firing at the same time so you are getting that choosh sound out the open exhaust port. One cyl is fighting the other .
 

Cofe

Lieutenant Commander
Joined
Apr 23, 2009
Messages
1,883
Re: 92 25 hp Rude Video Added

Here are a few things I found out about my 1990 Rude 25 that may help you.
First I did a compression check on the engine. I had the type of guage that builds up pressure as the pistons go back and forth several times, and it gives me the total built up pressure. The problem with this is that in a 2 cylinder engine with a bad head gasket between the two cylinders, will eventually give a steady compression reading between the two cylinders, and will be an erroneous reading. My plugs were fouling because I had to enrich the idle fuel, and water was getting into the cylinders from the bad head gasket. The plugs did not have any rust,(probably due to the rich mixture). My engine sounded just like yours in the video. I ended up replaceing the head gasket, and thermostat. I stoned the head, and it was dished between the two cylinders. At first I thought it was the carb, and had a kit put in, this did not help. I also put a kit in the fuel pump, and the motor starts right up now. My fuel pump must have been weak. I hope this will help you out, and I am finally happy to get my boat back up on the river.
PS. (Remember to launch your boat and go up stream on a river, so if something happens, you can float back to your trailer.):D
 
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