Still having problem with both engines

ihateboats32

Cadet
Joined
Jul 15, 2015
Messages
14
Hello all that can give me some help. This is the problem and what I have done so far. My engines smoke a lot all of a sudden. When I put them both in gear the choke up and will not increase the RPM. When in neutral the engines run perfect. This is what I have done so far.
1. On my first post someone suggested that the fuel that was put in was Diesel. Well I removed all fuel and put gas in and the same thing happens. I am getting like blueish black smoke.
2. I changed all plugs as after one start they are all black.
3. I changed my injectors to TJ17 as suggested on a previous post.
4. I changed Wires.
5. I changed Fuel FIlters.

Does anyone have a solution for me on this headache? Its really a nice boat and I would like to get these damn engines going again. All suggestions are very appreciated!

Thank you
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Black smoke is indicative of a rich fuel mixture. If this were on one engine only I'd say fuel pressure regulator is bad but it is highly unlikely the same problem would occur on both engines. Blue smoke is indicative of oil burning. The only way oil gets to the combustion chambers is down the valve guides, past the rings, or through a leaking intake manifold gasket. All of these however again would be common if this were on a single engine. Having the same problem on both is not likely.
 

Tail_Gunner

Admiral
Joined
Jan 13, 2006
Messages
6,237
Post your serial numbers for the boat...post the serial numbers on the cpu...Its a volvo so you should see something like shown below on the cpu...Thats what needed..See the tune noted on the housing...4.3TBI..And i assume your using the tj17 injector???
You should be running 30lbs or fuel pressure at 2500 rpm...have you cleaned your flame arestor's.....what if anything has been done to this engine is there any history


Picture003-6.jpg
 
Last edited:

ihateboats32

Cadet
Joined
Jul 15, 2015
Messages
14
No Title

Hello. I am not sure where to find the serial number for the boat but here are the serial numbers for the CPUs on both engines.
I did install the TJ17s that you suggested. What is Flame Arestor?
 

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GA_Boater

Honorary Moderator Emeritus
Joined
May 24, 2011
Messages
49,038
Flame arrestor looks like an air cleaner on top of the motor.. But it's not and they still get dirty and cut air to the motor.
 
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